Attachment 338993 Details for Bug 185022 – Patch

[patch] Patch

bug-185022-20180427084641.patch (text/plain), 149.11 KB, created by Chris Dumez on 2018-04-27 08:46:42 PDT

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Creator: Chris Dumez

Created: 2018-04-27 08:46:42 PDT

Size: 149.11 KB

patch

obsolete

>Subversion Revision: 230939
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index 6cfbe7e99c106d17357770ff141390f7e83f6e63..547df78464390b116b5ed78c2c7aef82617f4372 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,148 @@
>+2018-04-26  Chris Dumez  <cdumez@apple.com>
>+
>+        Use WindowProxy instead of DOMWindow in our IDL
>+        https://bugs.webkit.org/show_bug.cgi?id=185022
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Stop using DOMWindow in all of our IDL files and use WindowProxy as
>+        per their respective specifications. As a result, the implementation
>+        as also updated to use WindowProxy type instead of DOMWindow.
>+
>+        * WebCore.xcodeproj/project.pbxproj:
>+        * bindings/js/JSDOMConvertWindowProxy.h: Removed.
>+        * bindings/js/JSWindowProxy.cpp:
>+        (WebCore::JSWindowProxy::windowProxy const):
>+        (WebCore::JSWindowProxy::toWrapped):
>+        * bindings/js/JSWindowProxy.h:
>+        (WebCore::window):
>+        Use static_cast<>() instead of jsCast<>() because jsCast<>()
>+        relies on classInfo() which is not allowed to be called during
>+        JS sweep due to an assertion inside classInfo(). The JSWindowProxy
>+        objects are held strongly by the WindowProxy so we know the JSWindowProxy
>+        object is not getting destroyed here.
>+
>+        (WebCore::toJS):
>+        * bindings/js/WindowProxy.cpp:
>+        (WebCore::WindowProxy::globalObject):
>+        * bindings/js/WindowProxy.h:
>+        (WebCore::WindowProxy::frame const):
>+        * bindings/scripts/CodeGenerator.pm:
>+        (IsBuiltinType):
>+        (ComputeIsCallbackInterface):
>+        (ComputeIsCallbackFunction):
>+        * bindings/scripts/CodeGeneratorJS.pm:
>+        (AddToIncludesForIDLType):
>+        (GetBaseIDLType):
>+        (NativeToJSValueDOMConvertNeedsState):
>+        * bindings/scripts/test/JS/JSTestObj.cpp:
>+        (WebCore::jsTestObjPrototypeFunctionOverloadedMethod9Body):
>+        (WebCore::jsTestObjPrototypeFunctionOverloadedMethodOverloadDispatcher):
>+        * bindings/scripts/test/TestObj.idl:
>+        * dom/CompositionEvent.cpp:
>+        (WebCore::CompositionEvent::CompositionEvent):
>+        (WebCore::CompositionEvent::initCompositionEvent):
>+        * dom/CompositionEvent.h:
>+        * dom/CompositionEvent.idl:
>+        * dom/Document.cpp:
>+        (WebCore::Document::defaultView const):
>+        * dom/Document.h:
>+        * dom/Document.idl:
>+        * dom/DocumentTouch.cpp:
>+        (WebCore::DocumentTouch::createTouch):
>+        * dom/DocumentTouch.h:
>+        * dom/DocumentTouch.idl:
>+        * dom/FocusEvent.cpp:
>+        (WebCore::FocusEvent::FocusEvent):
>+        * dom/FocusEvent.h:
>+        * dom/InputEvent.cpp:
>+        (WebCore::InputEvent::create):
>+        (WebCore::InputEvent::InputEvent):
>+        * dom/InputEvent.h:
>+        * dom/KeyboardEvent.cpp:
>+        (WebCore::KeyboardEvent::KeyboardEvent):
>+        (WebCore::KeyboardEvent::create):
>+        (WebCore::KeyboardEvent::initKeyboardEvent):
>+        (WebCore::KeyboardEvent::charCode const):
>+        * dom/KeyboardEvent.h:
>+        * dom/KeyboardEvent.idl:
>+        * dom/MessageEvent.h:
>+        * dom/MessageEvent.idl:
>+        * dom/MouseEvent.cpp:
>+        (WebCore::MouseEvent::create):
>+        (WebCore::MouseEvent::MouseEvent):
>+        (WebCore::MouseEvent::initMouseEvent):
>+        (WebCore::MouseEvent::initMouseEventQuirk):
>+        * dom/MouseEvent.h:
>+        * dom/MouseEvent.idl:
>+        * dom/MouseRelatedEvent.cpp:
>+        (WebCore::MouseRelatedEvent::MouseRelatedEvent):
>+        (WebCore::MouseRelatedEvent::init):
>+        (WebCore::MouseRelatedEvent::frameViewFromWindowProxy):
>+        (WebCore::MouseRelatedEvent::initCoordinates):
>+        (WebCore::MouseRelatedEvent::documentToAbsoluteScaleFactor const):
>+        (WebCore::MouseRelatedEvent::computePageLocation):
>+        (WebCore::MouseRelatedEvent::locationInRootViewCoordinates const):
>+        * dom/MouseRelatedEvent.h:
>+        * dom/Node.cpp:
>+        * dom/SimulatedClick.cpp:
>+        * dom/TextEvent.cpp:
>+        (WebCore::TextEvent::create):
>+        (WebCore::TextEvent::createForPlainTextPaste):
>+        (WebCore::TextEvent::createForFragmentPaste):
>+        (WebCore::TextEvent::createForDrop):
>+        (WebCore::TextEvent::createForDictation):
>+        (WebCore::TextEvent::TextEvent):
>+        (WebCore::TextEvent::initTextEvent):
>+        * dom/TextEvent.h:
>+        * dom/TextEvent.idl:
>+        * dom/TouchEvent.idl:
>+        * dom/UIEvent.cpp:
>+        (WebCore::UIEvent::UIEvent):
>+        (WebCore::UIEvent::initUIEvent):
>+        * dom/UIEvent.h:
>+        (WebCore::UIEvent::create):
>+        (WebCore::UIEvent::view const):
>+        * dom/UIEvent.idl:
>+        * dom/UIEventInit.h:
>+        * dom/UIEventInit.idl:
>+        * dom/UIEventWithKeyState.h:
>+        (WebCore::UIEventWithKeyState::UIEventWithKeyState):
>+        * dom/WheelEvent.cpp:
>+        (WebCore::WheelEvent::WheelEvent):
>+        (WebCore::WheelEvent::create):
>+        (WebCore::WheelEvent::initWebKitWheelEvent):
>+        * dom/WheelEvent.h:
>+        * dom/WheelEvent.idl:
>+        * editing/AlternativeTextController.cpp:
>+        (WebCore::AlternativeTextController::insertDictatedText):
>+        * editing/Editor.cpp:
>+        (WebCore::Editor::pasteAsPlainText):
>+        (WebCore::Editor::pasteAsFragment):
>+        (WebCore::Editor::setComposition):
>+        * html/HTMLDocument.cpp:
>+        (WebCore::HTMLDocument::namedItem):
>+        * html/HTMLDocument.h:
>+        * html/HTMLDocument.idl:
>+        * html/HTMLFrameElement.idl:
>+        * html/HTMLFrameOwnerElement.cpp:
>+        (WebCore::HTMLFrameOwnerElement::contentWindow const):
>+        * html/HTMLFrameOwnerElement.h:
>+        * html/HTMLFrameSetElement.cpp:
>+        (WebCore::HTMLFrameSetElement::namedItem):
>+        * html/HTMLFrameSetElement.h:
>+        * html/HTMLFrameSetElement.idl:
>+        * html/HTMLIFrameElement.idl:
>+        * html/ImageDocument.cpp:
>+        * page/DOMWindow.cpp:
>+        (WebCore::PostMessageTimer::PostMessageTimer):
>+        (WebCore::PostMessageTimer::event):
>+        (WebCore::DOMWindow::postMessage):
>+        * page/DragController.cpp:
>+        (WebCore::DragController::dispatchTextInputEventFor):
>+        * page/EventHandler.cpp:
>+        (WebCore::EventHandler::handleTextInputEvent):
>+
> 2018-04-23  Michael Catanzaro  <mcatanzaro@igalia.com>
> 
>         [WPE][GTK] Remove WlUniquePtr<wl_display> footgun
>diff --git a/Source/WebKitLegacy/mac/ChangeLog b/Source/WebKitLegacy/mac/ChangeLog
>index f30895abaf670020742d4efc039018da277e76af..6ad525e9810ea02672fe1e09375611b8f386401f 100644
>--- a/Source/WebKitLegacy/mac/ChangeLog
>+++ b/Source/WebKitLegacy/mac/ChangeLog
>@@ -1,3 +1,37 @@
>+2018-04-26  Chris Dumez  <cdumez@apple.com>
>+
>+        Use WindowProxy instead of DOMWindow in our IDL
>+        https://bugs.webkit.org/show_bug.cgi?id=185022
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * DOM/DOMAbstractView.mm:
>+        (kit):
>+        (toWindowProxy):
>+        * DOM/DOMAbstractViewInternal.h:
>+        * DOM/DOMDocument.mm:
>+        (-[DOMDocument defaultView]):
>+        (-[DOMDocument getComputedStyle:pseudoElement:]):
>+        (-[DOMDocument getMatchedCSSRules:pseudoElement:authorOnly:]):
>+        * DOM/DOMHTMLFrameElement.mm:
>+        (-[DOMHTMLFrameElement contentWindow]):
>+        * DOM/DOMHTMLIFrameElement.mm:
>+        (-[DOMHTMLIFrameElement contentWindow]):
>+        * DOM/DOMKeyboardEvent.mm:
>+        (-[DOMKeyboardEvent initKeyboardEvent:canBubble:cancelable:view:keyIdentifier:location:ctrlKey:altKey:shiftKey:metaKey:altGraphKey:]):
>+        (-[DOMKeyboardEvent initKeyboardEvent:canBubble:cancelable:view:keyIdentifier:location:ctrlKey:altKey:shiftKey:metaKey:]):
>+        (-[DOMKeyboardEvent initKeyboardEvent:canBubble:cancelable:view:keyIdentifier:keyLocation:ctrlKey:altKey:shiftKey:metaKey:altGraphKey:]):
>+        (-[DOMKeyboardEvent initKeyboardEvent:canBubble:cancelable:view:keyIdentifier:keyLocation:ctrlKey:altKey:shiftKey:metaKey:]):
>+        * DOM/DOMMouseEvent.mm:
>+        (-[DOMMouseEvent initMouseEvent:canBubble:cancelable:view:detail:screenX:screenY:clientX:clientY:ctrlKey:altKey:shiftKey:metaKey:button:relatedTarget:]):
>+        * DOM/DOMTextEvent.mm:
>+        (-[DOMTextEvent initTextEvent:canBubbleArg:cancelableArg:viewArg:dataArg:]):
>+        * DOM/DOMUIEvent.mm:
>+        (-[DOMUIEvent view]):
>+        (-[DOMUIEvent initUIEvent:canBubble:cancelable:view:detail:]):
>+        * DOM/DOMWheelEvent.mm:
>+        (-[DOMWheelEvent initWheelEvent:wheelDeltaY:view:screenX:screenY:clientX:clientY:ctrlKey:altKey:shiftKey:metaKey:]):
>+
> 2018-04-23  Commit Queue  <commit-queue@webkit.org>
> 
>         Unreviewed, rolling out r230921, r230923, r230924, r230932,
>diff --git a/Source/WebKitLegacy/win/ChangeLog b/Source/WebKitLegacy/win/ChangeLog
>index dde8008dc187f3024995b2a4bc7d9cd0ca9efc4b..f9b5900f199e57c74abd423a9331add8f447c8dd 100644
>--- a/Source/WebKitLegacy/win/ChangeLog
>+++ b/Source/WebKitLegacy/win/ChangeLog
>@@ -1,3 +1,13 @@
>+2018-04-26  Chris Dumez  <cdumez@apple.com>
>+
>+        Use WindowProxy instead of DOMWindow in our IDL
>+        https://bugs.webkit.org/show_bug.cgi?id=185022
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        * DOMCoreClasses.cpp:
>+        (DOMDocument::getComputedStyle):
>+
> 2018-04-23  Commit Queue  <commit-queue@webkit.org>
> 
>         Unreviewed, rolling out r230921, r230923, r230924, r230932,
>diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>index 30f646ec7886009d080b7fce872f90c37c0bc66f..0114f2058faba9a2de01285970a660ad74949dd6 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -2365,7 +2365,6 @@
> 		83B2D1751B8BCD6A00A02E47 /* NativeNodeFilter.h in Headers */ = {isa = PBXBuildFile; fileRef = 83E959E11B8BC22B004D9385 /* NativeNodeFilter.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		83B74EF61F3E0BF200996BC7 /* KeepaliveRequestTracker.h in Headers */ = {isa = PBXBuildFile; fileRef = 83B74EF31F3E0BD700996BC7 /* KeepaliveRequestTracker.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		83B9687B19F8AB83004EF7AF /* StyleBuilderConverter.h in Headers */ = {isa = PBXBuildFile; fileRef = 83B9687919F8AB83004EF7AF /* StyleBuilderConverter.h */; };
>-		83B9E70B2086BA4300E5D756 /* JSDOMConvertWindowProxy.h in Headers */ = {isa = PBXBuildFile; fileRef = 83B9E7092086BA2700E5D756 /* JSDOMConvertWindowProxy.h */; settings = {ATTRIBUTES = (Private, ); }; };
> 		83BB5C881D5D6F45005A71F4 /* AllDescendantsCollection.h in Headers */ = {isa = PBXBuildFile; fileRef = 83BB5C871D5D6F3A005A71F4 /* AllDescendantsCollection.h */; };
> 		83C05A5B1A686212007E5DEA /* StylePropertyShorthandFunctions.h in Headers */ = {isa = PBXBuildFile; fileRef = 83C05A591A686212007E5DEA /* StylePropertyShorthandFunctions.h */; };
> 		83C1D425178D5AB400141E68 /* SVGPathSegArcAbs.h in Headers */ = {isa = PBXBuildFile; fileRef = 83C1D413178D5AB400141E68 /* SVGPathSegArcAbs.h */; };
>@@ -9877,7 +9876,6 @@
> 		83B74EF21F3E0BD700996BC7 /* KeepaliveRequestTracker.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = KeepaliveRequestTracker.cpp; sourceTree = "<group>"; };
> 		83B74EF31F3E0BD700996BC7 /* KeepaliveRequestTracker.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = KeepaliveRequestTracker.h; sourceTree = "<group>"; };
> 		83B9687919F8AB83004EF7AF /* StyleBuilderConverter.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = StyleBuilderConverter.h; sourceTree = "<group>"; };
>-		83B9E7092086BA2700E5D756 /* JSDOMConvertWindowProxy.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JSDOMConvertWindowProxy.h; sourceTree = "<group>"; };
> 		83BB5C871D5D6F3A005A71F4 /* AllDescendantsCollection.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = AllDescendantsCollection.h; sourceTree = "<group>"; };
> 		83C05A581A686212007E5DEA /* StylePropertyShorthandFunctions.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = StylePropertyShorthandFunctions.cpp; sourceTree = "<group>"; };
> 		83C05A591A686212007E5DEA /* StylePropertyShorthandFunctions.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = StylePropertyShorthandFunctions.h; sourceTree = "<group>"; };
>@@ -19835,7 +19833,6 @@
> 				7C8E34AA1E4A338E0054CE23 /* JSDOMConvertVariadic.h */,
> 				7CBA5BA61F0B4BDE0034D745 /* JSDOMConvertWebGL.cpp */,
> 				7C8E34AB1E4A338E0054CE23 /* JSDOMConvertWebGL.h */,
>-				83B9E7092086BA2700E5D756 /* JSDOMConvertWindowProxy.h */,
> 				7C8E34AC1E4A338E0054CE23 /* JSDOMConvertXPathNSResolver.h */,
> 			);
> 			name = Conversions;
>@@ -28416,7 +28413,6 @@
> 				7C8E34C41E4A33B00054CE23 /* JSDOMConvertUnion.h in Headers */,
> 				7C8E34C51E4A33B00054CE23 /* JSDOMConvertVariadic.h in Headers */,
> 				7C8E34C61E4A33B00054CE23 /* JSDOMConvertWebGL.h in Headers */,
>-				83B9E70B2086BA4300E5D756 /* JSDOMConvertWindowProxy.h in Headers */,
> 				7C8E34C71E4A33B00054CE23 /* JSDOMConvertXPathNSResolver.h in Headers */,
> 				FC9E0E4D16419C1E00392BE3 /* JSDOMCSSNamespace.h in Headers */,
> 				BC60D7C10D29A46300B9918F /* JSDOMException.h in Headers */,
>diff --git a/Source/WebCore/bindings/IDLTypes.h b/Source/WebCore/bindings/IDLTypes.h
>index 5fe77e83f23da2b1b420d1e392dea9dc07fb1c80..8057dfa115888d3db4a0f0be26b4c662b69c787c 100644
>--- a/Source/WebCore/bindings/IDLTypes.h
>+++ b/Source/WebCore/bindings/IDLTypes.h
>@@ -274,7 +274,6 @@ struct IDLScheduledAction : IDLType<std::unique_ptr<ScheduledAction>> { };
> template<typename T> struct IDLSerializedScriptValue : IDLWrapper<T> { };
> template<typename T> struct IDLEventListener : IDLWrapper<T> { };
> template<typename T> struct IDLXPathNSResolver : IDLWrapper<T> { };
>-struct IDLWindowProxy : IDLWrapper<JSWindowProxy> { };
> 
> struct IDLIDBKey : IDLWrapper<IDBKey> { };
> struct IDLIDBKeyData : IDLWrapper<IDBKeyData> { };
>diff --git a/Source/WebCore/bindings/js/JSDOMConvertWindowProxy.h b/Source/WebCore/bindings/js/JSDOMConvertWindowProxy.h
>deleted file mode 100644
>index 82c1ff48192de5c2082db7b3de0ac3baa4b34c7c..0000000000000000000000000000000000000000
>--- a/Source/WebCore/bindings/js/JSDOMConvertWindowProxy.h
>+++ /dev/null
>@@ -1,45 +0,0 @@
>-/*
>- * Copyright (C) 2016 Apple Inc. All rights reserved.
>- *
>- * Redistribution and use in source and binary forms, with or without
>- * modification, are permitted provided that the following conditions
>- * are met:
>- * 1. Redistributions of source code must retain the above copyright
>- *    notice, this list of conditions and the following disclaimer.
>- * 2. Redistributions in binary form must reproduce the above copyright
>- *    notice, this list of conditions and the following disclaimer in the
>- *    documentation and/or other materials provided with the distribution.
>- *
>- * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
>- * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
>- * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
>- * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
>- * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
>- * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
>- * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
>- * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
>- * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
>- * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
>- * THE POSSIBILITY OF SUCH DAMAGE.
>- */
>-
>-#pragma once
>-
>-#include "IDLTypes.h"
>-#include "JSDOMConvertBase.h"
>-#include "JSWindowProxy.h"
>-
>-namespace WebCore {
>-
>-template<> struct JSConverter<IDLWindowProxy> {
>-    static constexpr bool needsState = true;
>-    static constexpr bool needsGlobalObject = false;
>-
>-    template <typename U>
>-    static JSC::JSValue convert(JSC::ExecState& state, U&& value)
>-    {
>-        return toJS(&state, std::forward<U>(value));
>-    }
>-};
>-
>-}
>diff --git a/Source/WebCore/bindings/js/JSWindowProxy.cpp b/Source/WebCore/bindings/js/JSWindowProxy.cpp
>index 188671e49b1f14315c986771d07ba6f83e1abd27..a4b1805c652e2320bfd79a0979279acc087b6941 100644
>--- a/Source/WebCore/bindings/js/JSWindowProxy.cpp
>+++ b/Source/WebCore/bindings/js/JSWindowProxy.cpp
>@@ -119,6 +119,12 @@ void JSWindowProxy::setWindow(AbstractDOMWindow& domWindow)
>     ASSERT(prototype->globalObject() == window);
> }
> 
>+WindowProxy* JSWindowProxy::windowProxy() const
>+{
>+    auto& window = wrapped();
>+    return window.frame() ? &window.frame()->windowProxy() : nullptr;
>+}
>+
> void JSWindowProxy::attachDebugger(JSC::Debugger* debugger)
> {
>     auto* globalObject = window();
>@@ -138,12 +144,6 @@ AbstractDOMWindow& JSWindowProxy::wrapped() const
>     return jsCast<JSDOMWindowBase*>(window)->wrapped();
> }
> 
>-AbstractDOMWindow* JSWindowProxy::toWrapped(VM& vm, JSObject* value)
>-{
>-    auto* wrapper = jsDynamicCast<JSWindowProxy*>(vm, value);
>-    return wrapper ? &wrapper->wrapped() : nullptr;
>-}
>-
> JSValue toJS(ExecState* state, WindowProxy& windowProxy)
> {
>     return &windowProxy.jsWindowProxy(currentWorld(*state));
>@@ -154,4 +154,14 @@ JSWindowProxy& toJSWindowProxy(WindowProxy& windowProxy, DOMWrapperWorld& world)
>     return windowProxy.jsWindowProxy(world);
> }
> 
>+WindowProxy* JSWindowProxy::toWrapped(VM& vm, JSValue value)
>+{
>+    if (!value.isObject())
>+        return nullptr;
>+    JSObject* object = asObject(value);
>+    if (object->inherits<JSWindowProxy>(vm))
>+        return jsCast<JSWindowProxy*>(object)->windowProxy();
>+    return nullptr;
>+}
>+
> } // namespace WebCore
>diff --git a/Source/WebCore/bindings/js/JSWindowProxy.h b/Source/WebCore/bindings/js/JSWindowProxy.h
>index 185a54578bf8177cfca175c6e4b11f4748a40948..e6f171c68696a91a1dcd41d2381c04ce0d348ca2 100644
>--- a/Source/WebCore/bindings/js/JSWindowProxy.h
>+++ b/Source/WebCore/bindings/js/JSWindowProxy.h
>@@ -28,7 +28,9 @@
> 
> #pragma once
> 
>+#include "JSDOMConvertInterface.h"
> #include "JSDOMWindow.h"
>+#include "WindowProxy.h"
> #include <JavaScriptCore/JSProxy.h>
> 
> namespace JSC {
>@@ -39,7 +41,6 @@ namespace WebCore {
> 
> class AbstractDOMWindow;
> class AbstractFrame;
>-class WindowProxy;
> 
> class JSWindowProxy final : public JSC::JSProxy {
>     using Base = JSC::JSProxy;
>@@ -49,12 +50,14 @@ public:
> 
>     DECLARE_INFO;
> 
>-    JSDOMGlobalObject* window() const { return JSC::jsCast<JSDOMGlobalObject*>(target()); }
>+    JSDOMGlobalObject* window() const { return static_cast<JSDOMGlobalObject*>(target()); }
>     void setWindow(JSC::VM&, JSDOMGlobalObject&);
>     void setWindow(AbstractDOMWindow&);
> 
>+    WindowProxy* windowProxy() const;
>+
>     AbstractDOMWindow& wrapped() const;
>-    static WEBCORE_EXPORT AbstractDOMWindow* toWrapped(JSC::VM&, JSC::JSObject*);
>+    static WEBCORE_EXPORT WindowProxy* toWrapped(JSC::VM&, JSC::JSValue);
> 
>     DOMWrapperWorld& world() { return m_world; }
> 
>@@ -71,10 +74,16 @@ private:
> // It is, however, strongly owned by AbstractFrame via its WindowProxy, so we can get one from a WindowProxy.
> WEBCORE_EXPORT JSC::JSValue toJS(JSC::ExecState*, WindowProxy&);
> inline JSC::JSValue toJS(JSC::ExecState* state, WindowProxy* windowProxy) { return windowProxy ? toJS(state, *windowProxy) : JSC::jsNull(); }
>-inline JSC::JSValue toJS(JSC::ExecState* state, const RefPtr<WindowProxy>& windowProxy) { return toJS(state, windowProxy.get()); }
>+inline JSC::JSValue toJS(JSC::ExecState* state, JSDOMGlobalObject*, WindowProxy& windowProxy) { return toJS(state, windowProxy); }
>+inline JSC::JSValue toJS(JSC::ExecState* state, JSDOMGlobalObject* globalObject, WindowProxy* windowProxy) { return windowProxy ? toJS(state, globalObject, *windowProxy) : JSC::jsNull(); }
> 
> JSWindowProxy& toJSWindowProxy(WindowProxy&, DOMWrapperWorld&);
> inline JSWindowProxy* toJSWindowProxy(WindowProxy* windowProxy, DOMWrapperWorld& world) { return windowProxy ? &toJSWindowProxy(*windowProxy, world) : nullptr; }
> 
> 
>+template<> struct JSDOMWrapperConverterTraits<WindowProxy> {
>+    using WrapperClass = JSWindowProxy;
>+    using ToWrappedReturnType = WindowProxy*;
>+};
>+
> } // namespace WebCore
>diff --git a/Source/WebCore/bindings/js/WindowProxy.cpp b/Source/WebCore/bindings/js/WindowProxy.cpp
>index 8e8f51353ed1f7a0b5b3f9304cf81c8aacb75b5e..9018d23d23ca1e947aed2993d184f9102db7189b 100644
>--- a/Source/WebCore/bindings/js/WindowProxy.cpp
>+++ b/Source/WebCore/bindings/js/WindowProxy.cpp
>@@ -24,6 +24,7 @@
> #include "CommonVM.h"
> #include "Frame.h"
> #include "GCController.h"
>+#include "JSWindowProxy.h"
> #include "Page.h"
> #include "PageConsoleClient.h"
> #include "PageGroup.h"
>@@ -91,6 +92,11 @@ Vector<JSC::Strong<JSWindowProxy>> WindowProxy::jsWindowProxiesAsVector() const
>     return copyToVector(m_jsWindowProxies.values());
> }
> 
>+JSDOMGlobalObject* WindowProxy::globalObject(DOMWrapperWorld& world)
>+{
>+    return jsWindowProxy(world).window();
>+}
>+
> JSWindowProxy& WindowProxy::createJSWindowProxyWithInitializedScript(DOMWrapperWorld& world)
> {
>     JSLockHolder lock(world.vm());
>diff --git a/Source/WebCore/bindings/js/WindowProxy.h b/Source/WebCore/bindings/js/WindowProxy.h
>index 77722983b0a322cd067dfb5062da0777a68e65f8..11f02248b7acac5e5fc79ff434e1544c8fb52056 100644
>--- a/Source/WebCore/bindings/js/WindowProxy.h
>+++ b/Source/WebCore/bindings/js/WindowProxy.h
>@@ -20,7 +20,7 @@
> 
> #pragma once
> 
>-#include "JSWindowProxy.h"
>+#include "DOMWrapperWorld.h"
> #include <JavaScriptCore/Strong.h>
> #include <wtf/HashMap.h>
> 
>@@ -30,7 +30,10 @@ class Debugger;
> 
> namespace WebCore {
> 
>+class AbstractDOMWindow;
> class AbstractFrame;
>+class JSDOMGlobalObject;
>+class JSWindowProxy;
> 
> class WindowProxy {
>     WTF_MAKE_FAST_ALLOCATED;
>@@ -40,6 +43,8 @@ public:
>     explicit WindowProxy(AbstractFrame&);
>     ~WindowProxy();
> 
>+    AbstractFrame& frame() const { return m_frame; }
>+
>     void destroyJSWindowProxy(DOMWrapperWorld&);
> 
>     ProxyMap::ValuesConstIteratorRange jsWindowProxies() const { return m_jsWindowProxies.values(); }
>@@ -63,10 +68,7 @@ public:
>         return (it != m_jsWindowProxies.end()) ? it->value.get() : nullptr;
>     }
> 
>-    JSDOMGlobalObject* globalObject(DOMWrapperWorld& world)
>-    {
>-        return jsWindowProxy(world).window();
>-    }
>+    WEBCORE_EXPORT JSDOMGlobalObject* globalObject(DOMWrapperWorld&);
> 
>     void clearJSWindowProxiesNotMatchingDOMWindow(AbstractDOMWindow*, bool goingIntoPageCache);
> 
>diff --git a/Source/WebCore/bindings/scripts/CodeGenerator.pm b/Source/WebCore/bindings/scripts/CodeGenerator.pm
>index 952429a0e49774bad22c1e58ebb2e4eddbad3b63..2fcfee3a7aa8f22f26ebddb6a4e28fa038b2f4a4 100644
>--- a/Source/WebCore/bindings/scripts/CodeGenerator.pm
>+++ b/Source/WebCore/bindings/scripts/CodeGenerator.pm
>@@ -891,7 +891,6 @@ sub IsBuiltinType
>     return 1 if $type->name eq "XPathNSResolver";
>     return 1 if $type->name eq "any";
>     return 1 if $type->name eq "object";
>-    return 1 if $type->name eq "WindowProxy";
> 
>     return 0;
> }
>@@ -1001,6 +1000,7 @@ sub ComputeIsCallbackInterface
>     assert("Not a type") if ref($type) ne "IDLType";
> 
>     return 0 unless $object->IsInterfaceType($type);
>+    return 0 if $type->name eq "WindowProxy";
> 
>     my $typeName = $type->name;
>     my $idlFile = $object->IDLFileForInterface($typeName) or assert("Could NOT find IDL file for interface \"$typeName\"!\n");
>@@ -1038,6 +1038,7 @@ sub ComputeIsCallbackFunction
>     assert("Not a type") if ref($type) ne "IDLType";
> 
>     return 0 unless $object->IsInterfaceType($type);
>+    return 0 if $type->name eq "WindowProxy";
> 
>     my $typeName = $type->name;
>     my $idlFile = $object->IDLFileForInterface($typeName) or assert("Could NOT find IDL file for interface \"$typeName\"!\n");
>diff --git a/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm b/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm
>index 626a9f0b2d6f043cf92bdf32f29628926116e5e4..30a374c2824fa2608242aa38710984202b5d0ec0 100644
>--- a/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm
>+++ b/Source/WebCore/bindings/scripts/CodeGeneratorJS.pm
>@@ -421,13 +421,6 @@ sub AddToIncludesForIDLType
>         return;
>     }
> 
>-    if ($type->name eq "WindowProxy") {
>-        AddToIncludes("WindowProxy.h", $includesRef, $conditional);
>-        AddToIncludes("JSWindowProxy.h", $includesRef, $conditional);
>-        AddToIncludes("JSDOMConvertWindowProxy.h", $includesRef, $conditional);
>-        return;
>-    }
>-
>     if ($codeGenerator->IsStringType($type)) {
>         AddToIncludes("JSDOMConvertStrings.h", $includesRef, $conditional);
>         return;
>@@ -6393,7 +6386,6 @@ sub GetBaseIDLType
>         "JSON" => "IDLJSON",
>         "ScheduledAction" => "IDLScheduledAction",
>         "SerializedScriptValue" => "IDLSerializedScriptValue<SerializedScriptValue>",
>-        "WindowProxy" => "IDLWindowProxy",
>         "XPathNSResolver" => "IDLXPathNSResolver<XPathNSResolver>",
>     );
> 
>@@ -6554,7 +6546,6 @@ sub NativeToJSValueDOMConvertNeedsState
>     return 1 if $type->name eq "JSON";
>     return 1 if $type->name eq "SerializedScriptValue";
>     return 1 if $type->name eq "XPathNSResolver";
>-    return 1 if $type->name eq "WindowProxy";
>     
>     return 0;
> }
>diff --git a/Source/WebCore/bindings/scripts/test/JS/JSTestObj.cpp b/Source/WebCore/bindings/scripts/test/JS/JSTestObj.cpp
>index ba45bb98f21a633909d2be8e0a1fe2dc726a345f..c0466c266b737f6c885d2aafd05b5f16f682d501 100644
>--- a/Source/WebCore/bindings/scripts/test/JS/JSTestObj.cpp
>+++ b/Source/WebCore/bindings/scripts/test/JS/JSTestObj.cpp
>@@ -55,7 +55,6 @@
> #include "JSDOMOperation.h"
> #include "JSDOMOperationReturningPromise.h"
> #include "JSDOMStringList.h"
>-#include "JSDOMWindow.h"
> #include "JSDOMWindowBase.h"
> #include "JSDOMWrapperCache.h"
> #include "JSDocument.h"
>@@ -6957,7 +6956,7 @@ static inline JSC::EncodedJSValue jsTestObjPrototypeFunctionOverloadedMethod9Bod
>     UNUSED_PARAM(state);
>     UNUSED_PARAM(throwScope);
>     auto& impl = castedThis->wrapped();
>-    auto window = convert<IDLInterface<DOMWindow>>(*state, state->uncheckedArgument(0), [](JSC::ExecState& state, JSC::ThrowScope& scope) { throwArgumentTypeError(state, scope, 0, "window", "TestObject", "overloadedMethod", "DOMWindow"); });
>+    auto window = convert<IDLInterface<WindowProxy>>(*state, state->uncheckedArgument(0), [](JSC::ExecState& state, JSC::ThrowScope& scope) { throwArgumentTypeError(state, scope, 0, "window", "TestObject", "overloadedMethod", "WindowProxy"); });
>     RETURN_IF_EXCEPTION(throwScope, encodedJSValue());
>     impl.overloadedMethod(*window);
>     return JSValue::encode(jsUndefined());
>@@ -7029,7 +7028,7 @@ static inline JSC::EncodedJSValue jsTestObjPrototypeFunctionOverloadedMethodOver
>             return jsTestObjPrototypeFunctionOverloadedMethod6Body(state, castedThis, throwScope);
>         if (distinguishingArg.isObject() && asObject(distinguishingArg)->inherits<JSTestObj>(vm))
>             return jsTestObjPrototypeFunctionOverloadedMethod8Body(state, castedThis, throwScope);
>-        if (distinguishingArg.isObject() && (asObject(distinguishingArg)->inherits<JSWindowProxy>(vm) || asObject(distinguishingArg)->inherits<JSDOMWindow>(vm)))
>+        if (distinguishingArg.isObject() && asObject(distinguishingArg)->inherits<JSWindowProxy>(vm))
>             return jsTestObjPrototypeFunctionOverloadedMethod9Body(state, castedThis, throwScope);
>         if (distinguishingArg.isObject() && asObject(distinguishingArg)->inherits<JSBlob>(vm))
>             return jsTestObjPrototypeFunctionOverloadedMethod13Body(state, castedThis, throwScope);
>diff --git a/Source/WebCore/bindings/scripts/test/TestObj.idl b/Source/WebCore/bindings/scripts/test/TestObj.idl
>index c83eeeedbf4163f832bcd253ec05756846eed684..71ddfc489ed2d5da256fb5c430b932ebdc4f870b 100644
>--- a/Source/WebCore/bindings/scripts/test/TestObj.idl
>+++ b/Source/WebCore/bindings/scripts/test/TestObj.idl
>@@ -286,7 +286,7 @@ enum TestConfidence { "high", "kinda-low" };
>     void    overloadedMethod(DOMStringList? listArg);
>     void    overloadedMethod(sequence<DOMString>? arrayArg);
>     void    overloadedMethod(TestObj objArg);
>-    void    overloadedMethod(DOMWindow window);
>+    void    overloadedMethod(WindowProxy window);
>     void    overloadedMethod(sequence<DOMString> arrayArg);
>     void    overloadedMethod(sequence<unsigned long> arrayArg);
>     void    overloadedMethod(DOMString strArg);
>diff --git a/Source/WebCore/dom/CompositionEvent.cpp b/Source/WebCore/dom/CompositionEvent.cpp
>index 0e38a6718cd1dad2e79028b890056a6fcb642c90..007af7d724f5c3e4a0a36112566c482ed6fd5929 100644
>--- a/Source/WebCore/dom/CompositionEvent.cpp
>+++ b/Source/WebCore/dom/CompositionEvent.cpp
>@@ -31,8 +31,8 @@ namespace WebCore {
> 
> CompositionEvent::CompositionEvent() = default;
> 
>-CompositionEvent::CompositionEvent(const AtomicString& type, DOMWindow* view, const String& data)
>-    : UIEvent(type, true, true, view, 0)
>+CompositionEvent::CompositionEvent(const AtomicString& type, RefPtr<WindowProxy>&& view, const String& data)
>+    : UIEvent(type, true, true, WTFMove(view), 0)
>     , m_data(data)
> {
> }
>@@ -45,12 +45,12 @@ CompositionEvent::CompositionEvent(const AtomicString& type, const Init& initial
> 
> CompositionEvent::~CompositionEvent() = default;
> 
>-void CompositionEvent::initCompositionEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow* view, const String& data)
>+void CompositionEvent::initCompositionEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, const String& data)
> {
>     if (isBeingDispatched())
>         return;
> 
>-    initUIEvent(type, canBubble, cancelable, view, 0);
>+    initUIEvent(type, canBubble, cancelable, WTFMove(view), 0);
> 
>     m_data = data;
> }
>diff --git a/Source/WebCore/dom/CompositionEvent.h b/Source/WebCore/dom/CompositionEvent.h
>index 8ff02ec969778b885a6317024c957476e021b2a6..3b1c46d635ecaf6cd0919098f508fc41e64cebcf 100644
>--- a/Source/WebCore/dom/CompositionEvent.h
>+++ b/Source/WebCore/dom/CompositionEvent.h
>@@ -32,9 +32,9 @@ namespace WebCore {
> 
> class CompositionEvent final : public UIEvent {
> public:
>-    static Ref<CompositionEvent> create(const AtomicString& type, DOMWindow* view, const String& data)
>+    static Ref<CompositionEvent> create(const AtomicString& type, RefPtr<WindowProxy>&& view, const String& data)
>     {
>-        return adoptRef(*new CompositionEvent(type, view, data));
>+        return adoptRef(*new CompositionEvent(type, WTFMove(view), data));
>     }
> 
>     static Ref<CompositionEvent> createForBindings()
>@@ -53,7 +53,7 @@ public:
> 
>     virtual ~CompositionEvent();
> 
>-    void initCompositionEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow*, const String& data);
>+    void initCompositionEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, const String& data);
> 
>     String data() const { return m_data; }
> 
>@@ -61,7 +61,7 @@ public:
> 
> private:
>     CompositionEvent();
>-    CompositionEvent(const AtomicString& type, DOMWindow*, const String&);
>+    CompositionEvent(const AtomicString& type, RefPtr<WindowProxy>&&, const String&);
>     CompositionEvent(const AtomicString& type, const Init&, IsTrusted);
> 
>     bool isCompositionEvent() const override;
>diff --git a/Source/WebCore/dom/CompositionEvent.idl b/Source/WebCore/dom/CompositionEvent.idl
>index d87240883e27d3b3458539eb920f4d3f287166c4..20aac7ea4770d5659ed40910d7aa79508e661834 100644
>--- a/Source/WebCore/dom/CompositionEvent.idl
>+++ b/Source/WebCore/dom/CompositionEvent.idl
>@@ -33,7 +33,7 @@
>     void initCompositionEvent(optional DOMString typeArg = "undefined",
>                               optional boolean canBubbleArg = false,
>                               optional boolean cancelableArg = false,
>-                              optional DOMWindow? viewArg = null,
>+                              optional WindowProxy? viewArg = null,
>                               optional DOMString dataArg = "undefined");
> 
> };
>diff --git a/Source/WebCore/dom/Document.cpp b/Source/WebCore/dom/Document.cpp
>index 86f83e726423ac45435d32bef0494e9949e05499..7e7eda01772d4a8bc8bf16105bc45e25fdb820a1 100644
>--- a/Source/WebCore/dom/Document.cpp
>+++ b/Source/WebCore/dom/Document.cpp
>@@ -4280,6 +4280,13 @@ void Document::takeDOMWindowFrom(Document* document)
>     ASSERT(m_domWindow->frame() == m_frame);
> }
> 
>+WindowProxy* Document::windowProxy() const
>+{
>+    if (!m_frame)
>+        return nullptr;
>+    return &m_frame->windowProxy();
>+}
>+
> Document& Document::contextDocument() const
> {
>     if (m_contextDocument)
>diff --git a/Source/WebCore/dom/Document.h b/Source/WebCore/dom/Document.h
>index a4fb02f9e1bcbd400b0cc8652abd404f01c4595f..ce37f372178336757a77e50f4ebdc82406e3e38d 100644
>--- a/Source/WebCore/dom/Document.h
>+++ b/Source/WebCore/dom/Document.h
>@@ -799,7 +799,7 @@ public:
> 
>     DOMWindow* domWindow() const { return m_domWindow.get(); }
>     // In DOM Level 2, the Document's DOMWindow is called the defaultView.
>-    DOMWindow* defaultView() const { return domWindow(); } 
>+    WEBCORE_EXPORT WindowProxy* windowProxy() const;
> 
>     Document& contextDocument() const;
>     void setContextDocument(Document& document) { m_contextDocument = document.createWeakPtr(); }
>diff --git a/Source/WebCore/dom/Document.idl b/Source/WebCore/dom/Document.idl
>index 2d5baad8c60644da89d107fdde1828cd8a49d82b..413e53e216fa41d3a3df82e3229edaccbb14d5d6 100644
>--- a/Source/WebCore/dom/Document.idl
>+++ b/Source/WebCore/dom/Document.idl
>@@ -113,7 +113,7 @@ typedef (
>     [CEReactions, CallWith=ResponsibleDocument, MayThrowException] void writeln(DOMString... text);
> 
>     // User interaction.
>-    readonly attribute DOMWindow? defaultView;
>+    [ImplementedAs=windowProxy] readonly attribute WindowProxy? defaultView;
>     boolean hasFocus();
>     [CEReactions] attribute DOMString designMode;
>     [CEReactions] boolean execCommand(DOMString commandId, optional boolean showUI = false, optional DOMString? value = null); // FIXME: value should not be nullable.
>diff --git a/Source/WebCore/dom/DocumentTouch.cpp b/Source/WebCore/dom/DocumentTouch.cpp
>index 3d9123d8f7532cb4db79a4a1335d5f1728cc509a..5d126c3c324714f39f9f96e16369c0187847a80e 100644
>--- a/Source/WebCore/dom/DocumentTouch.cpp
>+++ b/Source/WebCore/dom/DocumentTouch.cpp
>@@ -28,20 +28,27 @@
> 
> #if ENABLE(TOUCH_EVENTS)
> 
>-#include "DOMWindow.h"
> #include "Document.h"
>+#include "Frame.h"
> #include "Touch.h"
> #include "TouchList.h"
>+#include "WindowProxy.h"
> 
> namespace WebCore {
> 
>-Ref<Touch> DocumentTouch::createTouch(Document& document, DOMWindow* window, EventTarget* target, int identifier, int pageX, int pageY, int screenX, int screenY, int radiusX, int radiusY, float rotationAngle, float force)
>+Ref<Touch> DocumentTouch::createTouch(Document& document, RefPtr<WindowProxy>&& window, EventTarget* target, int identifier, int pageX, int pageY, int screenX, int screenY, int radiusX, int radiusY, float rotationAngle, float force)
> {
>+    Frame* frame;
>+    if (window && is<Frame>(window->frame()))
>+        frame = &downcast<Frame>(window->frame());
>+    else
>+        frame = document.frame();
>+
>     // FIXME: It's not clear from the documentation at
>     // http://developer.apple.com/library/safari/#documentation/UserExperience/Reference/DocumentAdditionsReference/DocumentAdditions/DocumentAdditions.html
>     // when this method should throw and nor is it by inspection of iOS behavior. It would be nice to verify any cases where it throws under iOS
>     // and implement them here. See https://bugs.webkit.org/show_bug.cgi?id=47819
>-    return Touch::create(window ? window->frame() : document.frame(), target, identifier, screenX, screenY, pageX, pageY, radiusX, radiusY, rotationAngle, force);
>+    return Touch::create(frame, target, identifier, screenX, screenY, pageX, pageY, radiusX, radiusY, rotationAngle, force);
> }
> 
> Ref<TouchList> DocumentTouch::createTouchList(Document&, Vector<std::reference_wrapper<Touch>>&& touches)
>diff --git a/Source/WebCore/dom/DocumentTouch.h b/Source/WebCore/dom/DocumentTouch.h
>index e0daf5052cc97852c8a04bba73e5f6a116f10e51..72c4888b45ab400e29bc8aed86de4c5903eac222 100644
>--- a/Source/WebCore/dom/DocumentTouch.h
>+++ b/Source/WebCore/dom/DocumentTouch.h
>@@ -34,15 +34,15 @@
> 
> namespace WebCore {
> 
>-class DOMWindow;
> class Document;
> class EventTarget;
> class Touch;
> class TouchList;
>+class WindowProxy;
> 
> class DocumentTouch {
> public:
>-    static Ref<Touch> createTouch(Document&, DOMWindow*, EventTarget*, int identifier, int pageX, int pageY, int screenX, int screenY, int radiusX, int radiusY, float rotationAngle, float force);
>+    static Ref<Touch> createTouch(Document&, RefPtr<WindowProxy>&&, EventTarget*, int identifier, int pageX, int pageY, int screenX, int screenY, int radiusX, int radiusY, float rotationAngle, float force);
>     static Ref<TouchList> createTouchList(Document&, Vector<std::reference_wrapper<Touch>>&&);
> };
> 
>diff --git a/Source/WebCore/dom/DocumentTouch.idl b/Source/WebCore/dom/DocumentTouch.idl
>index 7a2737458654991b11b5563089e21957cc4c4e4a..0489a36ad6b12503cdb46af148cb59cfafd675ba 100644
>--- a/Source/WebCore/dom/DocumentTouch.idl
>+++ b/Source/WebCore/dom/DocumentTouch.idl
>@@ -22,7 +22,7 @@
>     Conditional=TOUCH_EVENTS
> ] partial interface Document {
>     // FIXME: This has been dropped from the standard now that Touch has a constructor.
>-    [NewObject] Touch createTouch(optional DOMWindow? window = null, optional EventTarget? target = null,
>+    [NewObject] Touch createTouch(optional WindowProxy? window = null, optional EventTarget? target = null,
>         optional long identifier = 0,
>         optional long pageX = 0, optional long pageY = 0, optional long screenX = 0, optional long screenY = 0,
>         optional long webkitRadiusX = 0, optional long webkitRadiusY = 0,
>diff --git a/Source/WebCore/dom/Element.cpp b/Source/WebCore/dom/Element.cpp
>index 0a2326396ddff994ebfae5c85600a7c7533788ca..a432397d7179b141d20df80fcbe46953cb186496 100644
>--- a/Source/WebCore/dom/Element.cpp
>+++ b/Source/WebCore/dom/Element.cpp
>@@ -273,7 +273,7 @@ bool Element::dispatchMouseEvent(const PlatformMouseEvent& platformEvent, const
>     if (isForceEvent(platformEvent) && !document().hasListenerTypeForEventType(platformEvent.type()))
>         return false;
> 
>-    Ref<MouseEvent> mouseEvent = MouseEvent::create(eventType, document().defaultView(), platformEvent, detail, relatedTarget);
>+    Ref<MouseEvent> mouseEvent = MouseEvent::create(eventType, document().windowProxy(), platformEvent, detail, relatedTarget);
> 
>     if (mouseEvent->type().isEmpty())
>         return true; // Shouldn't happen.
>@@ -304,7 +304,7 @@ bool Element::dispatchMouseEvent(const PlatformMouseEvent& platformEvent, const
> 
> bool Element::dispatchWheelEvent(const PlatformWheelEvent& platformEvent)
> {
>-    auto event = WheelEvent::create(platformEvent, document().defaultView());
>+    auto event = WheelEvent::create(platformEvent, document().windowProxy());
> 
>     // Events with no deltas are important because they convey platform information about scroll gestures
>     // and momentum beginning or ending. However, those events should not be sent to the DOM since some
>@@ -321,7 +321,7 @@ bool Element::dispatchWheelEvent(const PlatformWheelEvent& platformEvent)
> 
> bool Element::dispatchKeyEvent(const PlatformKeyboardEvent& platformEvent)
> {
>-    auto event = KeyboardEvent::create(platformEvent, document().defaultView());
>+    auto event = KeyboardEvent::create(platformEvent, document().windowProxy());
> 
>     if (Frame* frame = document().frame()) {
>         if (frame->eventHandler().accessibilityPreventsEventPropagation(event))
>@@ -2546,28 +2546,28 @@ void Element::dispatchFocusInEvent(const AtomicString& eventType, RefPtr<Element
> {
>     ASSERT_WITH_SECURITY_IMPLICATION(ScriptDisallowedScope::InMainThread::isScriptAllowed());
>     ASSERT(eventType == eventNames().focusinEvent || eventType == eventNames().DOMFocusInEvent);
>-    dispatchScopedEvent(FocusEvent::create(eventType, true, false, document().defaultView(), 0, WTFMove(oldFocusedElement)));
>+    dispatchScopedEvent(FocusEvent::create(eventType, true, false, document().windowProxy(), 0, WTFMove(oldFocusedElement)));
> }
> 
> void Element::dispatchFocusOutEvent(const AtomicString& eventType, RefPtr<Element>&& newFocusedElement)
> {
>     ASSERT_WITH_SECURITY_IMPLICATION(ScriptDisallowedScope::InMainThread::isScriptAllowed());
>     ASSERT(eventType == eventNames().focusoutEvent || eventType == eventNames().DOMFocusOutEvent);
>-    dispatchScopedEvent(FocusEvent::create(eventType, true, false, document().defaultView(), 0, WTFMove(newFocusedElement)));
>+    dispatchScopedEvent(FocusEvent::create(eventType, true, false, document().windowProxy(), 0, WTFMove(newFocusedElement)));
> }
> 
> void Element::dispatchFocusEvent(RefPtr<Element>&& oldFocusedElement, FocusDirection)
> {
>     if (auto* page = document().page())
>         page->chrome().client().elementDidFocus(*this);
>-    dispatchEvent(FocusEvent::create(eventNames().focusEvent, false, false, document().defaultView(), 0, WTFMove(oldFocusedElement)));
>+    dispatchEvent(FocusEvent::create(eventNames().focusEvent, false, false, document().windowProxy(), 0, WTFMove(oldFocusedElement)));
> }
> 
> void Element::dispatchBlurEvent(RefPtr<Element>&& newFocusedElement)
> {
>     if (auto* page = document().page())
>         page->chrome().client().elementDidBlur(*this);
>-    dispatchEvent(FocusEvent::create(eventNames().blurEvent, false, false, document().defaultView(), 0, WTFMove(newFocusedElement)));
>+    dispatchEvent(FocusEvent::create(eventNames().blurEvent, false, false, document().windowProxy(), 0, WTFMove(newFocusedElement)));
> }
> 
> void Element::dispatchWebKitImageReadyEventForTesting()
>@@ -2587,7 +2587,7 @@ bool Element::dispatchMouseForceWillBegin()
>         return false;
> 
>     PlatformMouseEvent platformMouseEvent { frame->eventHandler().lastKnownMousePosition(), frame->eventHandler().lastKnownMouseGlobalPosition(), NoButton, PlatformEvent::NoType, 1, false, false, false, false, WallTime::now(), ForceAtClick, NoTap };
>-    auto mouseForceWillBeginEvent = MouseEvent::create(eventNames().webkitmouseforcewillbeginEvent, document().defaultView(), platformMouseEvent, 0, nullptr);
>+    auto mouseForceWillBeginEvent = MouseEvent::create(eventNames().webkitmouseforcewillbeginEvent, document().windowProxy(), platformMouseEvent, 0, nullptr);
>     mouseForceWillBeginEvent->setTarget(this);
>     dispatchEvent(mouseForceWillBeginEvent);
> 
>diff --git a/Source/WebCore/dom/FocusEvent.cpp b/Source/WebCore/dom/FocusEvent.cpp
>index 16d8b3ff078d05ad91e2d6914671912855d7c484..986877326ce3fae4bb059e7c164d7bc18aa9dfdc 100644
>--- a/Source/WebCore/dom/FocusEvent.cpp
>+++ b/Source/WebCore/dom/FocusEvent.cpp
>@@ -40,8 +40,8 @@ bool FocusEvent::isFocusEvent() const
>     return true;
> }
> 
>-FocusEvent::FocusEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow* view, int detail, RefPtr<EventTarget>&& relatedTarget)
>-    : UIEvent(type, canBubble, cancelable, view, detail)
>+FocusEvent::FocusEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail, RefPtr<EventTarget>&& relatedTarget)
>+    : UIEvent(type, canBubble, cancelable, WTFMove(view), detail)
>     , m_relatedTarget(WTFMove(relatedTarget))
> {
> }
>diff --git a/Source/WebCore/dom/FocusEvent.h b/Source/WebCore/dom/FocusEvent.h
>index 06725574c06b91f29fb4f96a0b1b56134f196854..c7a4df8e77432cfe364a134f8de51516a057b89e 100644
>--- a/Source/WebCore/dom/FocusEvent.h
>+++ b/Source/WebCore/dom/FocusEvent.h
>@@ -35,9 +35,9 @@ class Node;
> 
> class FocusEvent final : public UIEvent {
> public:
>-    static Ref<FocusEvent> create(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow* view, int detail, RefPtr<EventTarget>&& relatedTarget)
>+    static Ref<FocusEvent> create(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail, RefPtr<EventTarget>&& relatedTarget)
>     {
>-        return adoptRef(*new FocusEvent(type, canBubble, cancelable, view, detail, WTFMove(relatedTarget)));
>+        return adoptRef(*new FocusEvent(type, canBubble, cancelable, WTFMove(view), detail, WTFMove(relatedTarget)));
>     }
> 
>     static Ref<FocusEvent> createForBindings()
>@@ -58,7 +58,7 @@ public:
> 
> private:
>     FocusEvent() = default;
>-    FocusEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow*, int, RefPtr<EventTarget>&&);
>+    FocusEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, int, RefPtr<EventTarget>&&);
>     FocusEvent(const AtomicString& type, const Init&, IsTrusted);
> 
>     EventInterface eventInterface() const final;
>diff --git a/Source/WebCore/dom/InputEvent.cpp b/Source/WebCore/dom/InputEvent.cpp
>index d449294fec6bc7970d6c42c4b97ab161c4f5b1f0..c17bf18d88a676472a187163e7b4514f84400a0a 100644
>--- a/Source/WebCore/dom/InputEvent.cpp
>+++ b/Source/WebCore/dom/InputEvent.cpp
>@@ -26,20 +26,20 @@
> #include "config.h"
> #include "InputEvent.h"
> 
>-#include "DOMWindow.h"
> #include "DataTransfer.h"
> #include "Node.h"
>+#include "WindowProxy.h"
> #include <wtf/Vector.h>
> 
> namespace WebCore {
> 
>-Ref<InputEvent> InputEvent::create(const AtomicString& eventType, const String& inputType, bool canBubble, bool cancelable, WebCore::DOMWindow *view, const String& data, RefPtr<DataTransfer>&& dataTransfer, const Vector<RefPtr<StaticRange>>& targetRanges, int detail)
>+Ref<InputEvent> InputEvent::create(const AtomicString& eventType, const String& inputType, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, const String& data, RefPtr<DataTransfer>&& dataTransfer, const Vector<RefPtr<StaticRange>>& targetRanges, int detail)
> {
>-    return adoptRef(*new InputEvent(eventType, inputType, canBubble, cancelable, view, data, WTFMove(dataTransfer), targetRanges, detail));
>+    return adoptRef(*new InputEvent(eventType, inputType, canBubble, cancelable, WTFMove(view), data, WTFMove(dataTransfer), targetRanges, detail));
> }
> 
>-InputEvent::InputEvent(const AtomicString& eventType, const String& inputType, bool canBubble, bool cancelable, DOMWindow* view, const String& data, RefPtr<DataTransfer>&& dataTransfer, const Vector<RefPtr<StaticRange>>& targetRanges, int detail)
>-    : UIEvent(eventType, canBubble, cancelable, view, detail)
>+InputEvent::InputEvent(const AtomicString& eventType, const String& inputType, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, const String& data, RefPtr<DataTransfer>&& dataTransfer, const Vector<RefPtr<StaticRange>>& targetRanges, int detail)
>+    : UIEvent(eventType, canBubble, cancelable, WTFMove(view), detail)
>     , m_inputType(inputType)
>     , m_data(data)
>     , m_dataTransfer(dataTransfer)
>diff --git a/Source/WebCore/dom/InputEvent.h b/Source/WebCore/dom/InputEvent.h
>index cad8dce7b3626d9a227634b358926c1f1254681b..d0507639c6c89c99d4d30a1ce936f9161b9c4ed3 100644
>--- a/Source/WebCore/dom/InputEvent.h
>+++ b/Source/WebCore/dom/InputEvent.h
>@@ -30,8 +30,8 @@
> 
> namespace WebCore {
> 
>-class DOMWindow;
> class DataTransfer;
>+class WindowProxy;
> 
> class InputEvent final : public UIEvent {
> public:
>@@ -39,13 +39,13 @@ public:
>         String data;
>     };
> 
>-    static Ref<InputEvent> create(const AtomicString& eventType, const String& inputType, bool canBubble, bool cancelable, DOMWindow* view, const String& data, RefPtr<DataTransfer>&&, const Vector<RefPtr<StaticRange>>& targetRanges, int detail);
>+    static Ref<InputEvent> create(const AtomicString& eventType, const String& inputType, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, const String& data, RefPtr<DataTransfer>&&, const Vector<RefPtr<StaticRange>>& targetRanges, int detail);
>     static Ref<InputEvent> create(const AtomicString& type, const Init& initializer, IsTrusted isTrusted = IsTrusted::No)
>     {
>         return adoptRef(*new InputEvent(type, initializer, isTrusted));
>     }
> 
>-    InputEvent(const AtomicString& eventType, const String& inputType, bool canBubble, bool cancelable, DOMWindow*, const String& data, RefPtr<DataTransfer>&&, const Vector<RefPtr<StaticRange>>& targetRanges, int detail);
>+    InputEvent(const AtomicString& eventType, const String& inputType, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, const String& data, RefPtr<DataTransfer>&&, const Vector<RefPtr<StaticRange>>& targetRanges, int detail);
>     InputEvent(const AtomicString& eventType, const Init&, IsTrusted);
> 
>     bool isInputEvent() const override { return true; }
>diff --git a/Source/WebCore/dom/KeyboardEvent.cpp b/Source/WebCore/dom/KeyboardEvent.cpp
>index 4da1017725fe892cfa8dacf0f5b7081dcc6cfbe9..4acb5f4ceb760e170f107cea3860989f67264ea5 100644
>--- a/Source/WebCore/dom/KeyboardEvent.cpp
>+++ b/Source/WebCore/dom/KeyboardEvent.cpp
>@@ -23,6 +23,7 @@
> #include "config.h"
> #include "KeyboardEvent.h"
> 
>+#include "DOMWindow.h"
> #include "Document.h"
> #include "Editor.h"
> #include "EventHandler.h"
>@@ -92,8 +93,8 @@ static inline KeyboardEvent::KeyLocationCode keyLocationCode(const PlatformKeybo
> 
> inline KeyboardEvent::KeyboardEvent() = default;
> 
>-inline KeyboardEvent::KeyboardEvent(const PlatformKeyboardEvent& key, DOMWindow* view)
>-    : UIEventWithKeyState(eventTypeForKeyboardEventType(key.type()), true, true, key.timestamp().approximateMonotonicTime(), view, 0, key.ctrlKey(), key.altKey(), key.shiftKey(), key.metaKey(), false, key.modifiers().contains(PlatformEvent::Modifier::CapsLockKey))
>+inline KeyboardEvent::KeyboardEvent(const PlatformKeyboardEvent& key, RefPtr<WindowProxy>&& view)
>+    : UIEventWithKeyState(eventTypeForKeyboardEventType(key.type()), true, true, key.timestamp().approximateMonotonicTime(), view.copyRef(), 0, key.ctrlKey(), key.altKey(), key.shiftKey(), key.metaKey(), false, key.modifiers().contains(PlatformEvent::Modifier::CapsLockKey))
>     , m_underlyingPlatformEvent(std::make_unique<PlatformKeyboardEvent>(key))
> #if ENABLE(KEYBOARD_KEY_ATTRIBUTE)
>     , m_key(key.key())
>@@ -104,7 +105,7 @@ inline KeyboardEvent::KeyboardEvent(const PlatformKeyboardEvent& key, DOMWindow*
>     , m_keyIdentifier(key.keyIdentifier())
>     , m_location(keyLocationCode(key))
>     , m_repeat(key.isAutoRepeat())
>-    , m_isComposing(view && view->frame() && view->frame()->editor().hasComposition())
>+    , m_isComposing(view && is<DOMWindow>(view->window()) && downcast<DOMWindow>(*view->window()).frame() && downcast<DOMWindow>(*view->window()).frame()->editor().hasComposition())
> #if USE(APPKIT)
>     , m_handledByInputMethod(key.handledByInputMethod())
>     , m_keypressCommands(key.commands())
>@@ -132,9 +133,9 @@ inline KeyboardEvent::KeyboardEvent(const AtomicString& eventType, const Init& i
> 
> KeyboardEvent::~KeyboardEvent() = default;
> 
>-Ref<KeyboardEvent> KeyboardEvent::create(const PlatformKeyboardEvent& platformEvent, DOMWindow* view)
>+Ref<KeyboardEvent> KeyboardEvent::create(const PlatformKeyboardEvent& platformEvent, RefPtr<WindowProxy>&& view)
> {
>-    return adoptRef(*new KeyboardEvent(platformEvent, view));
>+    return adoptRef(*new KeyboardEvent(platformEvent, WTFMove(view)));
> }
> 
> Ref<KeyboardEvent> KeyboardEvent::createForBindings()
>@@ -147,13 +148,13 @@ Ref<KeyboardEvent> KeyboardEvent::create(const AtomicString& type, const Init& i
>     return adoptRef(*new KeyboardEvent(type, initializer, isTrusted));
> }
> 
>-void KeyboardEvent::initKeyboardEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow* view,
>+void KeyboardEvent::initKeyboardEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view,
>     const String& keyIdentifier, unsigned location, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool altGraphKey)
> {
>     if (isBeingDispatched())
>         return;
> 
>-    initUIEvent(type, canBubble, cancelable, view, 0);
>+    initUIEvent(type, canBubble, cancelable, WTFMove(view), 0);
> 
>     m_keyIdentifier = keyIdentifier;
>     m_location = location;
>@@ -227,8 +228,9 @@ int KeyboardEvent::charCode() const
>     // Firefox: 0 for keydown/keyup events, character code for keypress
>     // We match Firefox, unless in backward compatibility mode, where we always return the character code.
>     bool backwardCompatibilityMode = false;
>-    if (view() && view()->frame())
>-        backwardCompatibilityMode = view()->frame()->eventHandler().needsKeyboardEventDisambiguationQuirks();
>+    auto* window = view() ? view()->window() : nullptr;
>+    if (is<DOMWindow>(window) && downcast<DOMWindow>(*window).frame())
>+        backwardCompatibilityMode = downcast<DOMWindow>(*window).frame()->eventHandler().needsKeyboardEventDisambiguationQuirks();
> 
>     if (!m_underlyingPlatformEvent || (type() != eventNames().keypressEvent && !backwardCompatibilityMode))
>         return 0;
>diff --git a/Source/WebCore/dom/KeyboardEvent.h b/Source/WebCore/dom/KeyboardEvent.h
>index 8210330eab0341f4ca54cd25c58b99546f0b15a9..1d3cc243799b19a744ee978a187eaeaec8805fb1 100644
>--- a/Source/WebCore/dom/KeyboardEvent.h
>+++ b/Source/WebCore/dom/KeyboardEvent.h
>@@ -43,7 +43,7 @@ public:
>         DOM_KEY_LOCATION_NUMPAD = 0x03
>     };
> 
>-    WEBCORE_EXPORT static Ref<KeyboardEvent> create(const PlatformKeyboardEvent&, DOMWindow*);
>+    WEBCORE_EXPORT static Ref<KeyboardEvent> create(const PlatformKeyboardEvent&, RefPtr<WindowProxy>&&);
>     static Ref<KeyboardEvent> createForBindings();
> 
>     struct Init : public EventModifierInit {
>@@ -65,7 +65,7 @@ public:
> 
>     virtual ~KeyboardEvent();
>     
>-    WEBCORE_EXPORT void initKeyboardEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow*,
>+    WEBCORE_EXPORT void initKeyboardEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&,
>         const String& keyIdentifier, unsigned location,
>         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool altGraphKey = false);
>     
>@@ -102,7 +102,7 @@ public:
> 
> private:
>     KeyboardEvent();
>-    KeyboardEvent(const PlatformKeyboardEvent&, DOMWindow*);
>+    KeyboardEvent(const PlatformKeyboardEvent&, RefPtr<WindowProxy>&&);
>     KeyboardEvent(const AtomicString&, const Init&, IsTrusted);
> 
>     std::unique_ptr<PlatformKeyboardEvent> m_underlyingPlatformEvent;
>diff --git a/Source/WebCore/dom/KeyboardEvent.idl b/Source/WebCore/dom/KeyboardEvent.idl
>index 757c07793f5e5f1e18438f78dd447e9a3a1d5109..cde450c3435335092a177d6df6368bf6351d7100 100644
>--- a/Source/WebCore/dom/KeyboardEvent.idl
>+++ b/Source/WebCore/dom/KeyboardEvent.idl
>@@ -52,7 +52,7 @@
>     // FIXME: this does not match the version in the DOM spec.
>     // FIXME: Using "undefined" as default parameter value is wrong.
>     void initKeyboardEvent(optional DOMString type = "undefined", optional boolean canBubble = false, optional boolean cancelable = false,
>-        optional DOMWindow? view = null, optional DOMString keyIdentifier = "undefined", optional unsigned long location = 0,
>+        optional WindowProxy? view = null, optional DOMString keyIdentifier = "undefined", optional unsigned long location = 0,
>         optional boolean ctrlKey = false, optional boolean altKey = false, optional boolean shiftKey = false, optional boolean metaKey = false, optional boolean altGraphKey = false);
> };
> 
>diff --git a/Source/WebCore/dom/MessageEvent.h b/Source/WebCore/dom/MessageEvent.h
>index 5197d5bae1ae35aab04f0cb50e76e9d8faa18b79..33092787d14ae6573ea1b9d1fd9a7d0eee0f402b 100644
>--- a/Source/WebCore/dom/MessageEvent.h
>+++ b/Source/WebCore/dom/MessageEvent.h
>@@ -27,12 +27,12 @@
> 
> #pragma once
> 
>-#include "DOMWindow.h"
> #include "Event.h"
> #include "JSValueInWrappedObject.h"
> #include "MessagePort.h"
> #include "SerializedScriptValue.h"
> #include "ServiceWorker.h"
>+#include "WindowProxy.h"
> #include <wtf/Variant.h>
> 
> namespace WebCore {
>@@ -40,9 +40,9 @@ namespace WebCore {
> class Blob;
> 
> #if ENABLE(SERVICE_WORKER)
>-using MessageEventSource = Variant<RefPtr<DOMWindow>, RefPtr<MessagePort>, RefPtr<ServiceWorker>>;
>+using MessageEventSource = Variant<RefPtr<WindowProxy>, RefPtr<MessagePort>, RefPtr<ServiceWorker>>;
> #else
>-using MessageEventSource = Variant<RefPtr<DOMWindow>, RefPtr<MessagePort>>;
>+using MessageEventSource = Variant<RefPtr<WindowProxy>, RefPtr<MessagePort>>;
> #endif
> 
> class MessageEvent final : public Event {
>diff --git a/Source/WebCore/dom/MessageEvent.idl b/Source/WebCore/dom/MessageEvent.idl
>index 02438fd4c47c3fc292eabf47e5c5e83f86950822..fa48c8fa5da5fdc3e0f2c2f7efbfa75cd8f540a7 100644
>--- a/Source/WebCore/dom/MessageEvent.idl
>+++ b/Source/WebCore/dom/MessageEvent.idl
>@@ -27,9 +27,9 @@
>  */
> 
> #if defined(ENABLE_SERVICE_WORKER) && ENABLE_SERVICE_WORKER
>-typedef (DOMWindow or MessagePort or ServiceWorker) MessageEventSource;
>+typedef (WindowProxy or MessagePort or ServiceWorker) MessageEventSource;
> #else
>-typedef (DOMWindow or MessagePort) MessageEventSource;
>+typedef (WindowProxy or MessagePort) MessageEventSource;
> #endif
> 
> [
>diff --git a/Source/WebCore/dom/MouseEvent.cpp b/Source/WebCore/dom/MouseEvent.cpp
>index a147e1218bb6e24f2ad764707460c667021f6c59..c896f8631a3d2bbda19306210feddb8986e4ca62 100644
>--- a/Source/WebCore/dom/MouseEvent.cpp
>+++ b/Source/WebCore/dom/MouseEvent.cpp
>@@ -44,13 +44,13 @@ Ref<MouseEvent> MouseEvent::create(const AtomicString& type, const MouseEventIni
>     return adoptRef(*new MouseEvent(type, initializer, isTrusted));
> }
> 
>-Ref<MouseEvent> MouseEvent::create(const AtomicString& eventType, DOMWindow* view, const PlatformMouseEvent& event, int detail, Node* relatedTarget)
>+Ref<MouseEvent> MouseEvent::create(const AtomicString& eventType, RefPtr<WindowProxy>&& view, const PlatformMouseEvent& event, int detail, Node* relatedTarget)
> {
>     bool isMouseEnterOrLeave = eventType == eventNames().mouseenterEvent || eventType == eventNames().mouseleaveEvent;
>     bool isCancelable = eventType != eventNames().mousemoveEvent && !isMouseEnterOrLeave;
>     bool canBubble = !isMouseEnterOrLeave;
> 
>-    return MouseEvent::create(eventType, canBubble, isCancelable, event.timestamp().approximateMonotonicTime(), view,
>+    return MouseEvent::create(eventType, canBubble, isCancelable, event.timestamp().approximateMonotonicTime(), WTFMove(view),
>         detail, event.globalPosition().x(), event.globalPosition().y(), event.position().x(), event.position().y(),
> #if ENABLE(POINTER_LOCK)
>         event.movementDelta().x(), event.movementDelta().y(),
>@@ -59,13 +59,13 @@ Ref<MouseEvent> MouseEvent::create(const AtomicString& eventType, DOMWindow* vie
>         relatedTarget, event.force(), event.syntheticClickType());
> }
> 
>-Ref<MouseEvent> MouseEvent::create(const AtomicString& type, bool canBubble, bool cancelable, MonotonicTime timestamp, DOMWindow* view, int detail, int screenX, int screenY, int pageX, int pageY,
>+Ref<MouseEvent> MouseEvent::create(const AtomicString& type, bool canBubble, bool cancelable, MonotonicTime timestamp, RefPtr<WindowProxy>&& view, int detail, int screenX, int screenY, int pageX, int pageY,
> #if ENABLE(POINTER_LOCK)
>     int movementX, int movementY,
> #endif
>     bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, unsigned short buttons, EventTarget* relatedTarget, double force, unsigned short syntheticClickType, DataTransfer* dataTransfer, bool isSimulated)
> {
>-    return adoptRef(*new MouseEvent(type, canBubble, cancelable, timestamp, view,
>+    return adoptRef(*new MouseEvent(type, canBubble, cancelable, timestamp, WTFMove(view),
>         detail, { screenX, screenY }, { pageX, pageY },
> #if ENABLE(POINTER_LOCK)
>         { movementX, movementY },
>@@ -73,19 +73,19 @@ Ref<MouseEvent> MouseEvent::create(const AtomicString& type, bool canBubble, boo
>         ctrlKey, altKey, shiftKey, metaKey, button, buttons, relatedTarget, force, syntheticClickType, dataTransfer, isSimulated));
> }
> 
>-Ref<MouseEvent> MouseEvent::create(const AtomicString& eventType, bool canBubble, bool cancelable, DOMWindow* view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, unsigned short buttons, unsigned short syntheticClickType, EventTarget* relatedTarget)
>+Ref<MouseEvent> MouseEvent::create(const AtomicString& eventType, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, unsigned short buttons, unsigned short syntheticClickType, EventTarget* relatedTarget)
> {
>-    return adoptRef(*new MouseEvent(eventType, canBubble, cancelable, view, detail, { screenX, screenY }, { clientX, clientY }, ctrlKey, altKey, shiftKey, metaKey, button, buttons, syntheticClickType, relatedTarget));
>+    return adoptRef(*new MouseEvent(eventType, canBubble, cancelable, WTFMove(view), detail, { screenX, screenY }, { clientX, clientY }, ctrlKey, altKey, shiftKey, metaKey, button, buttons, syntheticClickType, relatedTarget));
> }
> 
> MouseEvent::MouseEvent() = default;
> 
>-MouseEvent::MouseEvent(const AtomicString& eventType, bool canBubble, bool cancelable, MonotonicTime timestamp, DOMWindow* view, int detail, const IntPoint& screenLocation, const IntPoint& windowLocation,
>+MouseEvent::MouseEvent(const AtomicString& eventType, bool canBubble, bool cancelable, MonotonicTime timestamp, RefPtr<WindowProxy>&& view, int detail, const IntPoint& screenLocation, const IntPoint& windowLocation,
> #if ENABLE(POINTER_LOCK)
>         const IntPoint& movementDelta,
> #endif
>         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, unsigned short buttons, EventTarget* relatedTarget, double force, unsigned short syntheticClickType, DataTransfer* dataTransfer, bool isSimulated)
>-    : MouseRelatedEvent(eventType, canBubble, cancelable, timestamp, view, detail, screenLocation, windowLocation,
>+    : MouseRelatedEvent(eventType, canBubble, cancelable, timestamp, WTFMove(view), detail, screenLocation, windowLocation,
> #if ENABLE(POINTER_LOCK)
>         movementDelta,
> #endif
>@@ -100,8 +100,8 @@ MouseEvent::MouseEvent(const AtomicString& eventType, bool canBubble, bool cance
> {
> }
> 
>-MouseEvent::MouseEvent(const AtomicString& eventType, bool canBubble, bool cancelable, DOMWindow* view, int detail, const IntPoint& screenLocation, const IntPoint& clientLocation, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, unsigned short buttons, unsigned short syntheticClickType, EventTarget* relatedTarget)
>-    : MouseRelatedEvent(eventType, canBubble, cancelable, MonotonicTime::now(), view, detail, screenLocation, { },
>+MouseEvent::MouseEvent(const AtomicString& eventType, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail, const IntPoint& screenLocation, const IntPoint& clientLocation, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, unsigned short buttons, unsigned short syntheticClickType, EventTarget* relatedTarget)
>+    : MouseRelatedEvent(eventType, canBubble, cancelable, MonotonicTime::now(), WTFMove(view), detail, screenLocation, { },
> #if ENABLE(POINTER_LOCK)
>         { },
> #endif
>@@ -127,12 +127,12 @@ MouseEvent::MouseEvent(const AtomicString& eventType, const MouseEventInit& init
> 
> MouseEvent::~MouseEvent() = default;
> 
>-void MouseEvent::initMouseEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow* view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, EventTarget* relatedTarget)
>+void MouseEvent::initMouseEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, EventTarget* relatedTarget)
> {
>     if (isBeingDispatched())
>         return;
> 
>-    initUIEvent(type, canBubble, cancelable, view, detail);
>+    initUIEvent(type, canBubble, cancelable, WTFMove(view), detail);
> 
>     m_screenLocation = IntPoint(screenX, screenY);
>     m_ctrlKey = ctrlKey;
>@@ -152,7 +152,7 @@ void MouseEvent::initMouseEvent(const AtomicString& type, bool canBubble, bool c
> 
> // FIXME: We need this quirk because iAd Producer is calling this function with a relatedTarget that is not an EventTarget (rdar://problem/30640101).
> // We should remove this quirk when possible.
>-void MouseEvent::initMouseEventQuirk(ExecState& state, ScriptExecutionContext& scriptExecutionContext, const AtomicString& type, bool canBubble, bool cancelable, DOMWindow* view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, JSValue relatedTargetValue)
>+void MouseEvent::initMouseEventQuirk(ExecState& state, ScriptExecutionContext& scriptExecutionContext, const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, JSValue relatedTargetValue)
> {
>     EventTarget* relatedTarget = nullptr;
> #if PLATFORM(MAC)
>@@ -176,7 +176,7 @@ void MouseEvent::initMouseEventQuirk(ExecState& state, ScriptExecutionContext& s
> #if PLATFORM(MAC)
>     }
> #endif
>-    initMouseEvent(type, canBubble, cancelable, view, detail, screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey, button, relatedTarget);
>+    initMouseEvent(type, canBubble, cancelable, WTFMove(view), detail, screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey, button, relatedTarget);
> }
> 
> EventInterface MouseEvent::eventInterface() const
>diff --git a/Source/WebCore/dom/MouseEvent.h b/Source/WebCore/dom/MouseEvent.h
>index 26caf8f6b19151668b6803554a0b00164d3e1fcf..4b28079955b4cb73a2ce168eb5a139d73156a9f8 100644
>--- a/Source/WebCore/dom/MouseEvent.h
>+++ b/Source/WebCore/dom/MouseEvent.h
>@@ -29,19 +29,20 @@
> namespace WebCore {
> 
> class DataTransfer;
>+class Node;
> class PlatformMouseEvent;
> 
> class MouseEvent : public MouseRelatedEvent {
> public:
>-    WEBCORE_EXPORT static Ref<MouseEvent> create(const AtomicString& type, bool canBubble, bool cancelable, MonotonicTime timestamp, DOMWindow*, int detail, int screenX, int screenY, int pageX, int pageY,
>+    WEBCORE_EXPORT static Ref<MouseEvent> create(const AtomicString& type, bool canBubble, bool cancelable, MonotonicTime timestamp, RefPtr<WindowProxy>&&, int detail, int screenX, int screenY, int pageX, int pageY,
> #if ENABLE(POINTER_LOCK)
>         int movementX, int movementY,
> #endif
>         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, unsigned short buttons, EventTarget* relatedTarget, double force, unsigned short syntheticClickType, DataTransfer* = nullptr, bool isSimulated = false);
> 
>-    WEBCORE_EXPORT static Ref<MouseEvent> create(const AtomicString& eventType, DOMWindow*, const PlatformMouseEvent&, int detail, Node* relatedTarget);
>+    WEBCORE_EXPORT static Ref<MouseEvent> create(const AtomicString& eventType, RefPtr<WindowProxy>&&, const PlatformMouseEvent&, int detail, Node* relatedTarget);
> 
>-    static Ref<MouseEvent> create(const AtomicString& eventType, bool canBubble, bool cancelable, DOMWindow*, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, unsigned short buttons, unsigned short syntheticClickType, EventTarget* relatedTarget);
>+    static Ref<MouseEvent> create(const AtomicString& eventType, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, unsigned short buttons, unsigned short syntheticClickType, EventTarget* relatedTarget);
> 
>     static Ref<MouseEvent> createForBindings() { return adoptRef(*new MouseEvent); }
> 
>@@ -49,8 +50,8 @@ public:
> 
>     virtual ~MouseEvent();
> 
>-    WEBCORE_EXPORT void initMouseEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow*, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, EventTarget* relatedTarget);
>-    void initMouseEventQuirk(JSC::ExecState&, ScriptExecutionContext&, const AtomicString& type, bool canBubble, bool cancelable, DOMWindow*, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, JSC::JSValue relatedTarget);
>+    WEBCORE_EXPORT void initMouseEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, EventTarget* relatedTarget);
>+    void initMouseEventQuirk(JSC::ExecState&, ScriptExecutionContext&, const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, int detail, int screenX, int screenY, int clientX, int clientY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, JSC::JSValue relatedTarget);
> 
>     unsigned short button() const { return m_button; }
>     unsigned short buttons() const { return m_buttons; }
>@@ -70,7 +71,7 @@ public:
>     int which() const final;
> 
> protected:
>-    MouseEvent(const AtomicString& type, bool canBubble, bool cancelable, MonotonicTime timestamp, DOMWindow*,
>+    MouseEvent(const AtomicString& type, bool canBubble, bool cancelable, MonotonicTime timestamp, RefPtr<WindowProxy>&&,
>         int detail, const IntPoint& screenLocation, const IntPoint& windowLocation,
> #if ENABLE(POINTER_LOCK)
>         const IntPoint& movementDelta,
>@@ -78,7 +79,7 @@ protected:
>         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, unsigned short button, unsigned short buttons,
>         EventTarget* relatedTarget, double force, unsigned short syntheticClickType, DataTransfer*, bool isSimulated);
> 
>-    MouseEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow*,
>+    MouseEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&,
>         int detail, const IntPoint& screenLocation, const IntPoint& clientLocation,
>         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey,
>         unsigned short button, unsigned short buttons, unsigned short syntheticClickType, EventTarget* relatedTarget);
>diff --git a/Source/WebCore/dom/MouseEvent.idl b/Source/WebCore/dom/MouseEvent.idl
>index 0be0f88dd35d7cdfb8d3542dade16e3294fdc83a..60c4466671f0619fee09d0f0193f9a41f6b3e813 100644
>--- a/Source/WebCore/dom/MouseEvent.idl
>+++ b/Source/WebCore/dom/MouseEvent.idl
>@@ -43,7 +43,7 @@
>     // FIXME: relatedTarget should be of type EventTarget? but we need to use any to support a quirk for iAd Producer (rdar://problem/30640101).
>     [CallWith=ScriptState&ScriptExecutionContext, ImplementedAs=initMouseEventQuirk] void initMouseEvent(optional DOMString type = "undefined",
>         optional boolean canBubble = false, optional boolean cancelable = false,
>-        optional DOMWindow? view = null, optional long detail = 0,
>+        optional WindowProxy? view = null, optional long detail = 0,
>         optional long screenX = 0, optional long screenY = 0, optional long clientX = 0, optional long clientY = 0,
>         optional boolean ctrlKey = false, optional boolean altKey = false, optional boolean shiftKey = false, optional boolean metaKey = false,
>         optional unsigned short button = 0, optional any relatedTarget = null);
>diff --git a/Source/WebCore/dom/MouseRelatedEvent.cpp b/Source/WebCore/dom/MouseRelatedEvent.cpp
>index 853714d6ab1f01e8a5eace0d0e43975eb3d5849f..80a8267dc21bd8b3bf51830fe4b30a42a6120159 100644
>--- a/Source/WebCore/dom/MouseRelatedEvent.cpp
>+++ b/Source/WebCore/dom/MouseRelatedEvent.cpp
>@@ -32,13 +32,13 @@
> 
> namespace WebCore {
> 
>-MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, bool canBubble, bool cancelable, MonotonicTime timestamp, DOMWindow* DOMWindow,
>+MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, bool canBubble, bool cancelable, MonotonicTime timestamp, RefPtr<WindowProxy>&& view,
>                                      int detail, const IntPoint& screenLocation, const IntPoint& windowLocation,
> #if ENABLE(POINTER_LOCK)
>                                      const IntPoint& movementDelta,
> #endif
>                                      bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool isSimulated)
>-    : UIEventWithKeyState(eventType, canBubble, cancelable, timestamp, DOMWindow, detail, ctrlKey, altKey, shiftKey, metaKey, false, false)
>+    : UIEventWithKeyState(eventType, canBubble, cancelable, timestamp, WTFMove(view), detail, ctrlKey, altKey, shiftKey, metaKey, false, false)
>     , m_screenLocation(screenLocation)
> #if ENABLE(POINTER_LOCK)
>     , m_movementDelta(movementDelta)
>@@ -61,7 +61,7 @@ MouseRelatedEvent::MouseRelatedEvent(const AtomicString& eventType, const MouseR
> void MouseRelatedEvent::init(bool isSimulated, const IntPoint& windowLocation)
> {
>     if (!isSimulated) {
>-        if (auto* frameView = frameViewFromDOMWindow(view())) {
>+        if (auto* frameView = frameViewFromWindowProxy(view())) {
>             FloatPoint absolutePoint = frameView->windowToContents(windowLocation);
>             FloatPoint documentPoint = frameView->absoluteToDocumentPoint(absolutePoint);
>             m_pageLocation = flooredLayoutPoint(documentPoint);
>@@ -83,13 +83,13 @@ void MouseRelatedEvent::initCoordinates()
>     m_hasCachedRelativePosition = false;
> }
> 
>-FrameView* MouseRelatedEvent::frameViewFromDOMWindow(DOMWindow* window)
>+FrameView* MouseRelatedEvent::frameViewFromWindowProxy(WindowProxy* windowProxy)
> {
>-    auto* frame = window ? window->frame() : nullptr;
>-    if (!frame)
>+    if (!windowProxy || !is<DOMWindow>(windowProxy->window()))
>         return nullptr;
> 
>-    return frame->view();
>+    auto* frame = downcast<DOMWindow>(*windowProxy->window()).frame();
>+    return frame ? frame->view() : nullptr;
> }
> 
> LayoutPoint MouseRelatedEvent::pagePointToClientPoint(LayoutPoint pagePoint, FrameView* frameView)
>@@ -113,7 +113,7 @@ void MouseRelatedEvent::initCoordinates(const LayoutPoint& clientLocation)
>     // Set up initial values for coordinates.
>     // Correct values are computed lazily, see computeRelativePosition.
>     FloatSize documentToClientOffset;
>-    if (auto* frameView = frameViewFromDOMWindow(view()))
>+    if (auto* frameView = frameViewFromWindowProxy(view()))
>         documentToClientOffset = frameView->documentToClientOffset();
> 
>     m_clientLocation = clientLocation;
>@@ -128,7 +128,7 @@ void MouseRelatedEvent::initCoordinates(const LayoutPoint& clientLocation)
> 
> float MouseRelatedEvent::documentToAbsoluteScaleFactor() const
> {
>-    if (auto* frameView = frameViewFromDOMWindow(view()))
>+    if (auto* frameView = frameViewFromWindowProxy(view()))
>         return frameView->documentToAbsoluteScaleFactor();
> 
>     return 1;
>@@ -136,7 +136,7 @@ float MouseRelatedEvent::documentToAbsoluteScaleFactor() const
> 
> void MouseRelatedEvent::computePageLocation()
> {
>-    m_absoluteLocation = pagePointToAbsolutePoint(m_pageLocation, frameViewFromDOMWindow(view()));
>+    m_absoluteLocation = pagePointToAbsolutePoint(m_pageLocation, frameViewFromWindowProxy(view()));
> }
> 
> void MouseRelatedEvent::receivedTarget()
>@@ -185,7 +185,7 @@ void MouseRelatedEvent::computeRelativePosition()
>     
> FloatPoint MouseRelatedEvent::locationInRootViewCoordinates() const
> {
>-    if (auto* frameView = frameViewFromDOMWindow(view()))
>+    if (auto* frameView = frameViewFromWindowProxy(view()))
>         return frameView->contentsToRootView(roundedIntPoint(m_absoluteLocation));
> 
>     return m_absoluteLocation;
>diff --git a/Source/WebCore/dom/MouseRelatedEvent.h b/Source/WebCore/dom/MouseRelatedEvent.h
>index 0d83c3609f71eafef2171a9cd0d431ae6d854f8b..ad4e5d0c356f541e082e11a26a2d0cc115fd59c7 100644
>--- a/Source/WebCore/dom/MouseRelatedEvent.h
>+++ b/Source/WebCore/dom/MouseRelatedEvent.h
>@@ -67,14 +67,14 @@ public:
>     // usable with RenderObject::absoluteToLocal).
>     const LayoutPoint& absoluteLocation() const { return m_absoluteLocation; }
>     
>-    static FrameView* frameViewFromDOMWindow(DOMWindow*);
>+    static FrameView* frameViewFromWindowProxy(WindowProxy*);
> 
>     static LayoutPoint pagePointToClientPoint(LayoutPoint pagePoint, FrameView*);
>     static LayoutPoint pagePointToAbsolutePoint(LayoutPoint pagePoint, FrameView*);
> 
> protected:
>     MouseRelatedEvent() = default;
>-    MouseRelatedEvent(const AtomicString& type, bool canBubble, bool cancelable, MonotonicTime timestamp, DOMWindow*,
>+    MouseRelatedEvent(const AtomicString& type, bool canBubble, bool cancelable, MonotonicTime timestamp, RefPtr<WindowProxy>&&,
>         int detail, const IntPoint& screenLocation, const IntPoint& windowLocation,
> #if ENABLE(POINTER_LOCK)
>         const IntPoint& movementDelta,
>diff --git a/Source/WebCore/dom/Node.cpp b/Source/WebCore/dom/Node.cpp
>index 4b1e872579533fbf78712fd6d23d2c815b03eb38..bba678a2a71b64e25b2f0077df9654cddb1fc60f 100644
>--- a/Source/WebCore/dom/Node.cpp
>+++ b/Source/WebCore/dom/Node.cpp
>@@ -33,6 +33,7 @@
> #include "ComposedTreeAncestorIterator.h"
> #include "ContainerNodeAlgorithms.h"
> #include "ContextMenuController.h"
>+#include "DOMWindow.h"
> #include "DataTransfer.h"
> #include "DocumentType.h"
> #include "ElementIterator.h"
>@@ -2350,7 +2351,7 @@ void Node::dispatchDOMActivateEvent(Event& underlyingClickEvent)
> {
>     ASSERT_WITH_SECURITY_IMPLICATION(ScriptDisallowedScope::InMainThread::isScriptAllowed());
>     int detail = is<UIEvent>(underlyingClickEvent) ? downcast<UIEvent>(underlyingClickEvent).detail() : 0;
>-    auto event = UIEvent::create(eventNames().DOMActivateEvent, true, true, document().defaultView(), detail);
>+    auto event = UIEvent::create(eventNames().DOMActivateEvent, true, true, document().windowProxy(), detail);
>     event->setUnderlyingEvent(&underlyingClickEvent);
>     dispatchScopedEvent(event);
>     if (event->defaultHandled())
>diff --git a/Source/WebCore/dom/SimulatedClick.cpp b/Source/WebCore/dom/SimulatedClick.cpp
>index e0f4e352eca18dcdc8592492ec50842928ab6574..f46439aa60f66f1a6224afe7ca69ad9e842d06d4 100644
>--- a/Source/WebCore/dom/SimulatedClick.cpp
>+++ b/Source/WebCore/dom/SimulatedClick.cpp
>@@ -37,14 +37,14 @@ namespace WebCore {
> 
> class SimulatedMouseEvent final : public MouseEvent {
> public:
>-    static Ref<SimulatedMouseEvent> create(const AtomicString& eventType, DOMWindow* view, RefPtr<Event>&& underlyingEvent, Element& target, SimulatedClickSource source)
>+    static Ref<SimulatedMouseEvent> create(const AtomicString& eventType, RefPtr<WindowProxy>&& view, RefPtr<Event>&& underlyingEvent, Element& target, SimulatedClickSource source)
>     {
>-        return adoptRef(*new SimulatedMouseEvent(eventType, view, WTFMove(underlyingEvent), target, source));
>+        return adoptRef(*new SimulatedMouseEvent(eventType, WTFMove(view), WTFMove(underlyingEvent), target, source));
>     }
> 
> private:
>-    SimulatedMouseEvent(const AtomicString& eventType, DOMWindow* view, RefPtr<Event>&& underlyingEvent, Element& target, SimulatedClickSource source)
>-        : MouseEvent(eventType, true, true, underlyingEvent ? underlyingEvent->timeStamp() : MonotonicTime::now(), view, 0, { }, { },
>+    SimulatedMouseEvent(const AtomicString& eventType, RefPtr<WindowProxy>&& view, RefPtr<Event>&& underlyingEvent, Element& target, SimulatedClickSource source)
>+        : MouseEvent(eventType, true, true, underlyingEvent ? underlyingEvent->timeStamp() : MonotonicTime::now(), WTFMove(view), 0, { }, { },
> #if ENABLE(POINTER_LOCK)
>             { },
> #endif
>@@ -79,7 +79,7 @@ private:
> 
> static void simulateMouseEvent(const AtomicString& eventType, Element& element, Event* underlyingEvent, SimulatedClickSource source)
> {
>-    element.dispatchEvent(SimulatedMouseEvent::create(eventType, element.document().defaultView(), underlyingEvent, element, source));
>+    element.dispatchEvent(SimulatedMouseEvent::create(eventType, element.document().windowProxy(), underlyingEvent, element, source));
> }
> 
> void simulateClick(Element& element, Event* underlyingEvent, SimulatedClickMouseEventOptions mouseEventOptions, SimulatedClickVisualOptions visualOptions, SimulatedClickSource creationOptions)
>diff --git a/Source/WebCore/dom/TextEvent.cpp b/Source/WebCore/dom/TextEvent.cpp
>index bd024ea55f6ba84e32c90446fcbf828204d2c30c..b094493c1f8558498893c2cb7c0d0746b6ab5ba2 100644
>--- a/Source/WebCore/dom/TextEvent.cpp
>+++ b/Source/WebCore/dom/TextEvent.cpp
>@@ -38,29 +38,29 @@ Ref<TextEvent> TextEvent::createForBindings()
>     return adoptRef(*new TextEvent);
> }
> 
>-Ref<TextEvent> TextEvent::create(DOMWindow* view, const String& data, TextEventInputType inputType)
>+Ref<TextEvent> TextEvent::create(RefPtr<WindowProxy>&& view, const String& data, TextEventInputType inputType)
> {
>-    return adoptRef(*new TextEvent(view, data, inputType));
>+    return adoptRef(*new TextEvent(WTFMove(view), data, inputType));
> }
> 
>-Ref<TextEvent> TextEvent::createForPlainTextPaste(DOMWindow* view, const String& data, bool shouldSmartReplace)
>+Ref<TextEvent> TextEvent::createForPlainTextPaste(RefPtr<WindowProxy>&& view, const String& data, bool shouldSmartReplace)
> {
>-    return adoptRef(*new TextEvent(view, data, 0, shouldSmartReplace, false, MailBlockquoteHandling::RespectBlockquote));
>+    return adoptRef(*new TextEvent(WTFMove(view), data, 0, shouldSmartReplace, false, MailBlockquoteHandling::RespectBlockquote));
> }
> 
>-Ref<TextEvent> TextEvent::createForFragmentPaste(DOMWindow* view, RefPtr<DocumentFragment>&& data, bool shouldSmartReplace, bool shouldMatchStyle, MailBlockquoteHandling mailBlockquoteHandling)
>+Ref<TextEvent> TextEvent::createForFragmentPaste(RefPtr<WindowProxy>&& view, RefPtr<DocumentFragment>&& data, bool shouldSmartReplace, bool shouldMatchStyle, MailBlockquoteHandling mailBlockquoteHandling)
> {
>-    return adoptRef(*new TextEvent(view, emptyString(), WTFMove(data), shouldSmartReplace, shouldMatchStyle, mailBlockquoteHandling));
>+    return adoptRef(*new TextEvent(WTFMove(view), emptyString(), WTFMove(data), shouldSmartReplace, shouldMatchStyle, mailBlockquoteHandling));
> }
> 
>-Ref<TextEvent> TextEvent::createForDrop(DOMWindow* view, const String& data)
>+Ref<TextEvent> TextEvent::createForDrop(RefPtr<WindowProxy>&& view, const String& data)
> {
>-    return adoptRef(*new TextEvent(view, data, TextEventInputDrop));
>+    return adoptRef(*new TextEvent(WTFMove(view), data, TextEventInputDrop));
> }
> 
>-Ref<TextEvent> TextEvent::createForDictation(DOMWindow* view, const String& data, const Vector<DictationAlternative>& dictationAlternatives)
>+Ref<TextEvent> TextEvent::createForDictation(RefPtr<WindowProxy>&& view, const String& data, const Vector<DictationAlternative>& dictationAlternatives)
> {
>-    return adoptRef(*new TextEvent(view, data, dictationAlternatives));
>+    return adoptRef(*new TextEvent(WTFMove(view), data, dictationAlternatives));
> }
> 
> TextEvent::TextEvent()
>@@ -71,8 +71,8 @@ TextEvent::TextEvent()
> {
> }
> 
>-TextEvent::TextEvent(DOMWindow* view, const String& data, TextEventInputType inputType)
>-    : UIEvent(eventNames().textInputEvent, true, true, view, 0)
>+TextEvent::TextEvent(RefPtr<WindowProxy>&& view, const String& data, TextEventInputType inputType)
>+    : UIEvent(eventNames().textInputEvent, true, true, WTFMove(view), 0)
>     , m_inputType(inputType)
>     , m_data(data)
>     , m_shouldSmartReplace(false)
>@@ -81,8 +81,8 @@ TextEvent::TextEvent(DOMWindow* view, const String& data, TextEventInputType inp
> {
> }
> 
>-TextEvent::TextEvent(DOMWindow* view, const String& data, RefPtr<DocumentFragment>&& pastingFragment, bool shouldSmartReplace, bool shouldMatchStyle, MailBlockquoteHandling mailBlockquoteHandling)
>-    : UIEvent(eventNames().textInputEvent, true, true, view, 0)
>+TextEvent::TextEvent(RefPtr<WindowProxy>&& view, const String& data, RefPtr<DocumentFragment>&& pastingFragment, bool shouldSmartReplace, bool shouldMatchStyle, MailBlockquoteHandling mailBlockquoteHandling)
>+    : UIEvent(eventNames().textInputEvent, true, true, WTFMove(view), 0)
>     , m_inputType(TextEventInputPaste)
>     , m_data(data)
>     , m_pastingFragment(WTFMove(pastingFragment))
>@@ -92,8 +92,8 @@ TextEvent::TextEvent(DOMWindow* view, const String& data, RefPtr<DocumentFragmen
> {
> }
> 
>-TextEvent::TextEvent(DOMWindow* view, const String& data, const Vector<DictationAlternative>& dictationAlternatives)
>-    : UIEvent(eventNames().textInputEvent, true, true, view, 0)
>+TextEvent::TextEvent(RefPtr<WindowProxy>&& view, const String& data, const Vector<DictationAlternative>& dictationAlternatives)
>+    : UIEvent(eventNames().textInputEvent, true, true, WTFMove(view), 0)
>     , m_inputType(TextEventInputDictation)
>     , m_data(data)
>     , m_shouldSmartReplace(false)
>@@ -105,12 +105,12 @@ TextEvent::TextEvent(DOMWindow* view, const String& data, const Vector<Dictation
> 
> TextEvent::~TextEvent() = default;
> 
>-void TextEvent::initTextEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow* view, const String& data)
>+void TextEvent::initTextEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, const String& data)
> {
>     if (isBeingDispatched())
>         return;
> 
>-    initUIEvent(type, canBubble, cancelable, view, 0);
>+    initUIEvent(type, canBubble, cancelable, WTFMove(view), 0);
> 
>     m_inputType = TextEventInputKeyboard;
> 
>diff --git a/Source/WebCore/dom/TextEvent.h b/Source/WebCore/dom/TextEvent.h
>index 29eb26d0e074b54d34635604280d12a6988af8da..0ae2ac863fb81bbb286385165b6b1251d2dfb1b8 100644
>--- a/Source/WebCore/dom/TextEvent.h
>+++ b/Source/WebCore/dom/TextEvent.h
>@@ -38,16 +38,16 @@ namespace WebCore {
> 
>     class TextEvent final : public UIEvent {
>     public:
>-        static Ref<TextEvent> create(DOMWindow*, const String& data, TextEventInputType = TextEventInputKeyboard);
>+        static Ref<TextEvent> create(RefPtr<WindowProxy>&&, const String& data, TextEventInputType = TextEventInputKeyboard);
>         static Ref<TextEvent> createForBindings();
>-        static Ref<TextEvent> createForPlainTextPaste(DOMWindow*, const String& data, bool shouldSmartReplace);
>-        static Ref<TextEvent> createForFragmentPaste(DOMWindow*, RefPtr<DocumentFragment>&& data, bool shouldSmartReplace, bool shouldMatchStyle, MailBlockquoteHandling);
>-        static Ref<TextEvent> createForDrop(DOMWindow*, const String& data);
>-        static Ref<TextEvent> createForDictation(DOMWindow*, const String& data, const Vector<DictationAlternative>& dictationAlternatives);
>+        static Ref<TextEvent> createForPlainTextPaste(RefPtr<WindowProxy>&&, const String& data, bool shouldSmartReplace);
>+        static Ref<TextEvent> createForFragmentPaste(RefPtr<WindowProxy>&&, RefPtr<DocumentFragment>&& data, bool shouldSmartReplace, bool shouldMatchStyle, MailBlockquoteHandling);
>+        static Ref<TextEvent> createForDrop(RefPtr<WindowProxy>&&, const String& data);
>+        static Ref<TextEvent> createForDictation(RefPtr<WindowProxy>&&, const String& data, const Vector<DictationAlternative>& dictationAlternatives);
> 
>         virtual ~TextEvent();
>     
>-        WEBCORE_EXPORT void initTextEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow*, const String& data);
>+        WEBCORE_EXPORT void initTextEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, const String& data);
>     
>         String data() const { return m_data; }
> 
>@@ -71,9 +71,9 @@ namespace WebCore {
>     private:
>         TextEvent();
> 
>-        TextEvent(DOMWindow*, const String& data, TextEventInputType = TextEventInputKeyboard);
>-        TextEvent(DOMWindow*, const String& data, RefPtr<DocumentFragment>&&, bool shouldSmartReplace, bool shouldMatchStyle, MailBlockquoteHandling);
>-        TextEvent(DOMWindow*, const String& data, const Vector<DictationAlternative>& dictationAlternatives);
>+        TextEvent(RefPtr<WindowProxy>&&, const String& data, TextEventInputType = TextEventInputKeyboard);
>+        TextEvent(RefPtr<WindowProxy>&&, const String& data, RefPtr<DocumentFragment>&&, bool shouldSmartReplace, bool shouldMatchStyle, MailBlockquoteHandling);
>+        TextEvent(RefPtr<WindowProxy>&&, const String& data, const Vector<DictationAlternative>& dictationAlternatives);
> 
>         bool isTextEvent() const override;
> 
>diff --git a/Source/WebCore/dom/TextEvent.idl b/Source/WebCore/dom/TextEvent.idl
>index 364065fa82d41899c0c523250c2f2799770d3e0e..ce8b30acb3c71ffdf828b2181065aaa1f8a12626 100644
>--- a/Source/WebCore/dom/TextEvent.idl
>+++ b/Source/WebCore/dom/TextEvent.idl
>@@ -32,7 +32,7 @@ interface TextEvent : UIEvent {
>     void initTextEvent(optional DOMString typeArg = "undefined",
>                        optional boolean canBubbleArg = false,
>                        optional boolean cancelableArg = false,
>-                       optional DOMWindow? viewArg = null,
>+                       optional WindowProxy? viewArg = null,
>                        optional DOMString dataArg = "undefined");
> 
> };
>diff --git a/Source/WebCore/dom/TouchEvent.cpp b/Source/WebCore/dom/TouchEvent.cpp
>index 61c08f21da38baa7a110f22dca6a57be93b683e7..00237cdad56837952d93a97de26a99e9eafc391b 100644
>--- a/Source/WebCore/dom/TouchEvent.cpp
>+++ b/Source/WebCore/dom/TouchEvent.cpp
>@@ -38,9 +38,9 @@ TouchEvent::TouchEvent() = default;
> 
> TouchEvent::TouchEvent(TouchList* touches, TouchList* targetTouches,
>         TouchList* changedTouches, const AtomicString& type, 
>-        DOMWindow* view, int screenX, int screenY, int pageX, int pageY,
>+        RefPtr<WindowProxy>&& view, int screenX, int screenY, int pageX, int pageY,
>         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
>-    : MouseRelatedEvent(type, true, true, MonotonicTime::now(), view, 0, IntPoint(screenX, screenY),
>+    : MouseRelatedEvent(type, true, true, MonotonicTime::now(), WTFMove(view), 0, IntPoint(screenX, screenY),
>                         IntPoint(pageX, pageY),
> #if ENABLE(POINTER_LOCK)
>                         IntPoint(0, 0),
>@@ -64,13 +64,13 @@ TouchEvent::~TouchEvent() = default;
> 
> void TouchEvent::initTouchEvent(TouchList* touches, TouchList* targetTouches,
>         TouchList* changedTouches, const AtomicString& type, 
>-        DOMWindow* view, int screenX, int screenY, int clientX, int clientY,
>+        RefPtr<WindowProxy>&& view, int screenX, int screenY, int clientX, int clientY,
>         bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
> {
>     if (isBeingDispatched())
>         return;
> 
>-    initUIEvent(type, true, true, view, 0);
>+    initUIEvent(type, true, true, WTFMove(view), 0);
> 
>     m_touches = touches;
>     m_targetTouches = targetTouches;
>diff --git a/Source/WebCore/dom/TouchEvent.h b/Source/WebCore/dom/TouchEvent.h
>index d339c0b72b13d455a5e03866e55720ccf6bf1edb..85fa161f2196d3f2a05d9a31a117b0a1af866f99 100644
>--- a/Source/WebCore/dom/TouchEvent.h
>+++ b/Source/WebCore/dom/TouchEvent.h
>@@ -41,12 +41,12 @@ public:
> 
>     static Ref<TouchEvent> create(TouchList* touches, 
>             TouchList* targetTouches, TouchList* changedTouches, 
>-            const AtomicString& type, DOMWindow* view,
>+            const AtomicString& type, RefPtr<WindowProxy>&& view,
>             int screenX, int screenY, int pageX, int pageY,
>             bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
>     {
>         return adoptRef(*new TouchEvent(touches, targetTouches, changedTouches,
>-                type, view, screenX, screenY, pageX, pageY,
>+                type, WTFMove(view), screenX, screenY, pageX, pageY,
>                 ctrlKey, altKey, shiftKey, metaKey));
>     }
>     static Ref<TouchEvent> createForBindings()
>@@ -67,7 +67,7 @@ public:
> 
>     void initTouchEvent(TouchList* touches, TouchList* targetTouches,
>             TouchList* changedTouches, const AtomicString& type, 
>-            DOMWindow*, int screenX, int screenY,
>+            RefPtr<WindowProxy>&&, int screenX, int screenY,
>             int clientX, int clientY,
>             bool ctrlKey, bool altKey, bool shiftKey, bool metaKey);
> 
>@@ -87,7 +87,7 @@ private:
>     TouchEvent();
>     TouchEvent(TouchList* touches, TouchList* targetTouches,
>             TouchList* changedTouches, const AtomicString& type,
>-            DOMWindow*, int screenX, int screenY, int pageX,
>+            RefPtr<WindowProxy>&&, int screenX, int screenY, int pageX,
>             int pageY,
>             bool ctrlKey, bool altKey, bool shiftKey, bool metaKey);
>     TouchEvent(const AtomicString&, const Init&, IsTrusted);
>diff --git a/Source/WebCore/dom/TouchEvent.idl b/Source/WebCore/dom/TouchEvent.idl
>index 81058357ed3aa7774d26fafae1603b15dde0d60b..54e99db4830f30d462642e33d4395693b13f2b0a 100644
>--- a/Source/WebCore/dom/TouchEvent.idl
>+++ b/Source/WebCore/dom/TouchEvent.idl
>@@ -40,7 +40,7 @@
>                         optional TouchList? targetTouches = null,
>                         optional TouchList? changedTouches = null,
>                         optional DOMString type = "undefined",
>-                        optional DOMWindow? view = null,
>+                        optional WindowProxy? view = null,
>                         optional long screenX = 0,
>                         optional long screenY = 0,
>                         optional long clientX = 0,
>diff --git a/Source/WebCore/dom/UIEvent.cpp b/Source/WebCore/dom/UIEvent.cpp
>index ab20eecb9c5831def0279ca78a0e7cc5fa856217..0a6f81af523716f758178f0f95344cdc655b8008 100644
>--- a/Source/WebCore/dom/UIEvent.cpp
>+++ b/Source/WebCore/dom/UIEvent.cpp
>@@ -32,16 +32,16 @@ UIEvent::UIEvent()
> {
> }
> 
>-UIEvent::UIEvent(const AtomicString& eventType, bool canBubbleArg, bool cancelableArg, DOMWindow* viewArg, int detailArg)
>+UIEvent::UIEvent(const AtomicString& eventType, bool canBubbleArg, bool cancelableArg, RefPtr<WindowProxy>&& viewArg, int detailArg)
>     : Event(eventType, canBubbleArg, cancelableArg)
>-    , m_view(viewArg)
>+    , m_view(WTFMove(viewArg))
>     , m_detail(detailArg)
> {
> }
> 
>-UIEvent::UIEvent(const AtomicString& eventType, bool canBubbleArg, bool cancelableArg, MonotonicTime timestamp, DOMWindow* viewArg, int detailArg)
>+UIEvent::UIEvent(const AtomicString& eventType, bool canBubbleArg, bool cancelableArg, MonotonicTime timestamp, RefPtr<WindowProxy>&& viewArg, int detailArg)
>     : Event(eventType, canBubbleArg, cancelableArg, timestamp)
>-    , m_view(viewArg)
>+    , m_view(WTFMove(viewArg))
>     , m_detail(detailArg)
> {
> }
>@@ -55,7 +55,7 @@ UIEvent::UIEvent(const AtomicString& eventType, const UIEventInit& initializer,
> 
> UIEvent::~UIEvent() = default;
> 
>-void UIEvent::initUIEvent(const AtomicString& typeArg, bool canBubbleArg, bool cancelableArg, DOMWindow* viewArg, int detailArg)
>+void UIEvent::initUIEvent(const AtomicString& typeArg, bool canBubbleArg, bool cancelableArg, RefPtr<WindowProxy>&& viewArg, int detailArg)
> {
>     if (isBeingDispatched())
>         return;
>diff --git a/Source/WebCore/dom/UIEvent.h b/Source/WebCore/dom/UIEvent.h
>index baa731fcf81eebaf23153da51ba0aeafd2455fac..50f2d17719942e473fdec9b1a884860593cd19a4 100644
>--- a/Source/WebCore/dom/UIEvent.h
>+++ b/Source/WebCore/dom/UIEvent.h
>@@ -23,20 +23,20 @@
> 
> #pragma once
> 
>-#include "DOMWindow.h"
> #include "Event.h"
> #include "UIEventInit.h"
>+#include "WindowProxy.h"
> 
> namespace WebCore {
> 
> // FIXME: Remove this when no one is depending on it anymore.
>-typedef DOMWindow AbstractView;
>+typedef WindowProxy AbstractView;
> 
> class UIEvent : public Event {
> public:
>-    static Ref<UIEvent> create(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow* view, int detail)
>+    static Ref<UIEvent> create(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail)
>     {
>-        return adoptRef(*new UIEvent(type, canBubble, cancelable, view, detail));
>+        return adoptRef(*new UIEvent(type, canBubble, cancelable, WTFMove(view), detail));
>     }
>     static Ref<UIEvent> createForBindings()
>     {
>@@ -48,9 +48,9 @@ public:
>     }
>     virtual ~UIEvent();
> 
>-    WEBCORE_EXPORT void initUIEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow*, int detail);
>+    WEBCORE_EXPORT void initUIEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, int detail);
> 
>-    DOMWindow* view() const { return m_view.get(); }
>+    WindowProxy* view() const { return m_view.get(); }
>     int detail() const { return m_detail; }
> 
>     EventInterface eventInterface() const override;
>@@ -65,14 +65,14 @@ public:
> 
> protected:
>     UIEvent();
>-    UIEvent(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow*, int detail);
>-    UIEvent(const AtomicString& type, bool canBubble, bool cancelable, MonotonicTime timestamp, DOMWindow*, int detail);
>+    UIEvent(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&&, int detail);
>+    UIEvent(const AtomicString& type, bool canBubble, bool cancelable, MonotonicTime timestamp, RefPtr<WindowProxy>&&, int detail);
>     UIEvent(const AtomicString&, const UIEventInit&, IsTrusted);
> 
> private:
>     bool isUIEvent() const final;
> 
>-    RefPtr<DOMWindow> m_view;
>+    RefPtr<WindowProxy> m_view;
>     int m_detail;
> };
> 
>diff --git a/Source/WebCore/dom/UIEvent.idl b/Source/WebCore/dom/UIEvent.idl
>index 87b391528303197e36c64c1e708ffb60cbad9503..6a35c57a3874bc8ec63d6d924d428b2b58100f6a 100644
>--- a/Source/WebCore/dom/UIEvent.idl
>+++ b/Source/WebCore/dom/UIEvent.idl
>@@ -20,11 +20,11 @@
> [
>     Constructor(DOMString type, optional UIEventInit eventInitDict)
> ] interface UIEvent : Event {
>-    readonly attribute DOMWindow view;
>+    readonly attribute WindowProxy view;
>     readonly attribute long detail;
>     
>     // FIXME: Using "undefined" as default parameter value is wrong.
>-    void initUIEvent(optional DOMString type = "undefined", optional boolean canBubble = false, optional boolean cancelable = false, optional DOMWindow? view = null, optional long detail = 0);
>+    void initUIEvent(optional DOMString type = "undefined", optional boolean canBubble = false, optional boolean cancelable = false, optional WindowProxy? view = null, optional long detail = 0);
> 
>     readonly attribute long layerX;
>     readonly attribute long layerY;
>diff --git a/Source/WebCore/dom/UIEventInit.h b/Source/WebCore/dom/UIEventInit.h
>index 0316bc06f568e53916df696f41445ba9fc31ff36..e1128a76de5860162fa976dcdc827170d8f2f3ae 100644
>--- a/Source/WebCore/dom/UIEventInit.h
>+++ b/Source/WebCore/dom/UIEventInit.h
>@@ -25,14 +25,14 @@
> 
> #pragma once
> 
>-#include "DOMWindow.h"
> #include "EventInit.h"
>+#include "WindowProxy.h"
> #include <wtf/RefPtr.h>
> 
> namespace WebCore {
> 
> struct UIEventInit : public EventInit {
>-    RefPtr<DOMWindow> view;
>+    RefPtr<WindowProxy> view;
>     int detail { 0 };
> };
> 
>diff --git a/Source/WebCore/dom/UIEventInit.idl b/Source/WebCore/dom/UIEventInit.idl
>index 0d7eb8efc1c537a905117b612111ad01eb1e0aa2..3ccbbed60755f6f21652f5ba61e6f38240c17ff0 100644
>--- a/Source/WebCore/dom/UIEventInit.idl
>+++ b/Source/WebCore/dom/UIEventInit.idl
>@@ -24,6 +24,6 @@
>  */
> 
> dictionary UIEventInit : EventInit {
>-    DOMWindow? view = null;
>+    WindowProxy? view = null;
>     long detail = 0;
> };
>diff --git a/Source/WebCore/dom/UIEventWithKeyState.h b/Source/WebCore/dom/UIEventWithKeyState.h
>index 0a8e4031248d6f7265442e5bf80012ba30cccdeb..085a0317ec8dce3a60fe26afa5a162ea2a9a051c 100644
>--- a/Source/WebCore/dom/UIEventWithKeyState.h
>+++ b/Source/WebCore/dom/UIEventWithKeyState.h
>@@ -40,8 +40,8 @@ public:
> protected:
>     UIEventWithKeyState() = default;
> 
>-    UIEventWithKeyState(const AtomicString& type, bool canBubble, bool cancelable, DOMWindow* view, int detail, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
>-        : UIEvent(type, canBubble, cancelable, view, detail)
>+    UIEventWithKeyState(const AtomicString& type, bool canBubble, bool cancelable, RefPtr<WindowProxy>&& view, int detail, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
>+        : UIEvent(type, canBubble, cancelable, WTFMove(view), detail)
>         , m_ctrlKey(ctrlKey)
>         , m_altKey(altKey)
>         , m_shiftKey(shiftKey)
>@@ -49,9 +49,9 @@ protected:
>     {
>     }
> 
>-    UIEventWithKeyState(const AtomicString& type, bool canBubble, bool cancelable, MonotonicTime timestamp, DOMWindow* view,
>+    UIEventWithKeyState(const AtomicString& type, bool canBubble, bool cancelable, MonotonicTime timestamp, RefPtr<WindowProxy>&& view,
>         int detail, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey, bool altGraphKey, bool capsLockKey)
>-            : UIEvent(type, canBubble, cancelable, timestamp, view, detail)
>+            : UIEvent(type, canBubble, cancelable, timestamp, WTFMove(view), detail)
>             , m_ctrlKey(ctrlKey)
>             , m_altKey(altKey)
>             , m_shiftKey(shiftKey)
>diff --git a/Source/WebCore/dom/WheelEvent.cpp b/Source/WebCore/dom/WheelEvent.cpp
>index d2b8fb72d9198e14bf758ca3afbc1ec247f71cbd..537cb193c813f527ac533c93089087bdb368be9c 100644
>--- a/Source/WebCore/dom/WheelEvent.cpp
>+++ b/Source/WebCore/dom/WheelEvent.cpp
>@@ -47,8 +47,8 @@ inline WheelEvent::WheelEvent(const AtomicString& type, const Init& initializer,
> {
> }
> 
>-inline WheelEvent::WheelEvent(const PlatformWheelEvent& event, DOMWindow* view)
>-    : MouseEvent(eventNames().wheelEvent, true, true, event.timestamp().approximateMonotonicTime(), view, 0, event.globalPosition(), event.position()
>+inline WheelEvent::WheelEvent(const PlatformWheelEvent& event, RefPtr<WindowProxy>&& view)
>+    : MouseEvent(eventNames().wheelEvent, true, true, event.timestamp().approximateMonotonicTime(), WTFMove(view), 0, event.globalPosition(), event.position()
> #if ENABLE(POINTER_LOCK)
>         , { }
> #endif
>@@ -61,9 +61,9 @@ inline WheelEvent::WheelEvent(const PlatformWheelEvent& event, DOMWindow* view)
> {
> }
> 
>-Ref<WheelEvent> WheelEvent::create(const PlatformWheelEvent& event, DOMWindow* view)
>+Ref<WheelEvent> WheelEvent::create(const PlatformWheelEvent& event, RefPtr<WindowProxy>&& view)
> {
>-    return adoptRef(*new WheelEvent(event, view));
>+    return adoptRef(*new WheelEvent(event, WTFMove(view)));
> }
> 
> Ref<WheelEvent> WheelEvent::createForBindings()
>@@ -76,12 +76,12 @@ Ref<WheelEvent> WheelEvent::create(const AtomicString& type, const Init& initial
>     return adoptRef(*new WheelEvent(type, initializer, isTrusted));
> }
> 
>-void WheelEvent::initWebKitWheelEvent(int rawDeltaX, int rawDeltaY, DOMWindow* view, int screenX, int screenY, int pageX, int pageY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
>+void WheelEvent::initWebKitWheelEvent(int rawDeltaX, int rawDeltaY, RefPtr<WindowProxy>&& view, int screenX, int screenY, int pageX, int pageY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey)
> {
>     if (isBeingDispatched())
>         return;
>     
>-    initMouseEvent(eventNames().wheelEvent, true, true, view, 0, screenX, screenY, pageX, pageY, ctrlKey, altKey, shiftKey, metaKey, 0, nullptr);
>+    initMouseEvent(eventNames().wheelEvent, true, true, WTFMove(view), 0, screenX, screenY, pageX, pageY, ctrlKey, altKey, shiftKey, metaKey, 0, nullptr);
> 
>     // Normalize to 120 multiple for compatibility with IE.
>     m_wheelDelta = { rawDeltaX * TickMultiplier, rawDeltaY * TickMultiplier };
>diff --git a/Source/WebCore/dom/WheelEvent.h b/Source/WebCore/dom/WheelEvent.h
>index 4d34b30d6ded5ef2815a8137e4c297e641ade6da..10b62e05c70156076ffe5cf127397ec1323dd2d1 100644
>--- a/Source/WebCore/dom/WheelEvent.h
>+++ b/Source/WebCore/dom/WheelEvent.h
>@@ -39,7 +39,7 @@ public:
>         DOM_DELTA_PAGE
>     };
> 
>-    static Ref<WheelEvent> create(const PlatformWheelEvent&, DOMWindow*);
>+    static Ref<WheelEvent> create(const PlatformWheelEvent&, RefPtr<WindowProxy>&&);
>     static Ref<WheelEvent> createForBindings();
> 
>     struct Init : MouseEventInit {
>@@ -53,7 +53,7 @@ public:
> 
>     static Ref<WheelEvent> create(const AtomicString& type, const Init&, IsTrusted = IsTrusted::No);
> 
>-    WEBCORE_EXPORT void initWebKitWheelEvent(int rawDeltaX, int rawDeltaY, DOMWindow*, int screenX, int screenY, int pageX, int pageY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey);
>+    WEBCORE_EXPORT void initWebKitWheelEvent(int rawDeltaX, int rawDeltaY, RefPtr<WindowProxy>&&, int screenX, int screenY, int pageX, int pageY, bool ctrlKey, bool altKey, bool shiftKey, bool metaKey);
> 
>     const std::optional<PlatformWheelEvent>& underlyingPlatformEvent() const { return m_underlyingPlatformEvent; }
> 
>@@ -75,7 +75,7 @@ public:
> private:
>     WheelEvent();
>     WheelEvent(const AtomicString&, const Init&, IsTrusted);
>-    WheelEvent(const PlatformWheelEvent&, DOMWindow*);
>+    WheelEvent(const PlatformWheelEvent&, RefPtr<WindowProxy>&&);
> 
>     EventInterface eventInterface() const final;
> 
>diff --git a/Source/WebCore/dom/WheelEvent.idl b/Source/WebCore/dom/WheelEvent.idl
>index 93c53a4bfb2daf4bd44273866a92ced4a1c1c386..b281da1c66044a8a93d60d90eddf51d14c6c934a 100644
>--- a/Source/WebCore/dom/WheelEvent.idl
>+++ b/Source/WebCore/dom/WheelEvent.idl
>@@ -39,7 +39,7 @@
> 
>     readonly attribute boolean webkitDirectionInvertedFromDevice;
> 
>-    void initWebKitWheelEvent(optional long wheelDeltaX = 0, optional long wheelDeltaY = 0, optional DOMWindow? view = null,
>+    void initWebKitWheelEvent(optional long wheelDeltaX = 0, optional long wheelDeltaY = 0, optional WindowProxy? view = null,
>         optional long screenX = 0, optional long screenY = 0, optional long clientX = 0, optional long clientY = 0,
>         optional boolean ctrlKey = false, optional boolean altKey = false,
>         optional boolean shiftKey = false, optional boolean metaKey = false);
>diff --git a/Source/WebCore/editing/AlternativeTextController.cpp b/Source/WebCore/editing/AlternativeTextController.cpp
>index d14724277237468d4f61ffe33c75fe46a81923dc..d453f6440ad46ebe30a0cba9eae222741a5abf42 100644
>--- a/Source/WebCore/editing/AlternativeTextController.cpp
>+++ b/Source/WebCore/editing/AlternativeTextController.cpp
>@@ -632,7 +632,7 @@ bool AlternativeTextController::insertDictatedText(const String& text, const Vec
>     if (FrameView* view = m_frame.view())
>         view->disableLayerFlushThrottlingTemporarilyForInteraction();
> 
>-    Ref<TextEvent> event = TextEvent::createForDictation(m_frame.document()->domWindow(), text, dictationAlternatives);
>+    auto event = TextEvent::createForDictation(&m_frame.windowProxy(), text, dictationAlternatives);
>     event->setUnderlyingEvent(triggeringEvent);
> 
>     target->dispatchEvent(event);
>diff --git a/Source/WebCore/editing/Editor.cpp b/Source/WebCore/editing/Editor.cpp
>index cb8b6b8bbac85bc0e32ded2ef339c2410290d319..6c66907808d7b321aa9e6184189606adf49e7c2c 100644
>--- a/Source/WebCore/editing/Editor.cpp
>+++ b/Source/WebCore/editing/Editor.cpp
>@@ -115,7 +115,7 @@ static bool dispatchBeforeInputEvent(Element& element, const AtomicString& input
>     if (!element.document().settings().inputEventsEnabled())
>         return true;
> 
>-    auto event = InputEvent::create(eventNames().beforeinputEvent, inputType, true, cancelable, element.document().defaultView(), data, WTFMove(dataTransfer), targetRanges, 0);
>+    auto event = InputEvent::create(eventNames().beforeinputEvent, inputType, true, cancelable, element.document().windowProxy(), data, WTFMove(dataTransfer), targetRanges, 0);
>     element.dispatchEvent(event);
>     return !event->defaultPrevented();
> }
>@@ -127,7 +127,7 @@ static void dispatchInputEvent(Element& element, const AtomicString& inputType,
>         // but TypingCommands are special in that existing TypingCommands that are applied again fire input events *from within* the scope by calling typingAddedToOpenCommand.
>         // Instead, TypingCommands should always dispatch events synchronously after the end of the scoped queue in CompositeEditCommand::apply. To work around this for the
>         // time being, just revert back to calling dispatchScopedEvent.
>-        element.dispatchScopedEvent(InputEvent::create(eventNames().inputEvent, inputType, true, false, element.document().defaultView(), data, WTFMove(dataTransfer), targetRanges, 0));
>+        element.dispatchScopedEvent(InputEvent::create(eventNames().inputEvent, inputType, true, false, element.document().windowProxy(), data, WTFMove(dataTransfer), targetRanges, 0));
>     } else
>         element.dispatchInputEvent();
> }
>@@ -569,7 +569,7 @@ void Editor::pasteAsPlainText(const String& pastingText, bool smartReplace)
>     Element* target = findEventTargetFromSelection();
>     if (!target)
>         return;
>-    target->dispatchEvent(TextEvent::createForPlainTextPaste(document().domWindow(), pastingText, smartReplace));
>+    target->dispatchEvent(TextEvent::createForPlainTextPaste(document().windowProxy(), pastingText, smartReplace));
> }
> 
> void Editor::pasteAsFragment(Ref<DocumentFragment>&& pastingFragment, bool smartReplace, bool matchStyle, MailBlockquoteHandling respectsMailBlockquote)
>@@ -577,7 +577,7 @@ void Editor::pasteAsFragment(Ref<DocumentFragment>&& pastingFragment, bool smart
>     Element* target = findEventTargetFromSelection();
>     if (!target)
>         return;
>-    target->dispatchEvent(TextEvent::createForFragmentPaste(document().domWindow(), WTFMove(pastingFragment), smartReplace, matchStyle, respectsMailBlockquote));
>+    target->dispatchEvent(TextEvent::createForFragmentPaste(document().windowProxy(), WTFMove(pastingFragment), smartReplace, matchStyle, respectsMailBlockquote));
> }
> 
> void Editor::pasteAsPlainTextBypassingDHTML()
>@@ -1848,7 +1848,7 @@ void Editor::setComposition(const String& text, SetCompositionMode mode)
>     insertTextForConfirmedComposition(text);
> 
>     if (auto* target = document().focusedElement())
>-        target->dispatchEvent(CompositionEvent::create(eventNames().compositionendEvent, document().domWindow(), text));
>+        target->dispatchEvent(CompositionEvent::create(eventNames().compositionendEvent, document().windowProxy(), text));
> 
>     if (mode == CancelComposition) {
>         // An open typing command that disagrees about current selection would cause issues with typing later on.
>@@ -1908,11 +1908,11 @@ void Editor::setComposition(const String& text, const Vector<CompositionUnderlin
>             // We should send a compositionstart event only when the given text is not empty because this
>             // function doesn't create a composition node when the text is empty.
>             if (!text.isEmpty()) {
>-                target->dispatchEvent(CompositionEvent::create(eventNames().compositionstartEvent, document().domWindow(), originalText));
>-                event = CompositionEvent::create(eventNames().compositionupdateEvent, document().domWindow(), text);
>+                target->dispatchEvent(CompositionEvent::create(eventNames().compositionstartEvent, document().windowProxy(), originalText));
>+                event = CompositionEvent::create(eventNames().compositionupdateEvent, document().windowProxy(), text);
>             }
>         } else if (!text.isEmpty())
>-            event = CompositionEvent::create(eventNames().compositionupdateEvent, document().domWindow(), text);
>+            event = CompositionEvent::create(eventNames().compositionupdateEvent, document().windowProxy(), text);
> 
>         if (event)
>             target->dispatchEvent(*event);
>@@ -1923,7 +1923,7 @@ void Editor::setComposition(const String& text, const Vector<CompositionUnderlin
>     if (text.isEmpty()) {
>         TypingCommand::deleteSelection(document(), TypingCommand::PreventSpellChecking, TypingCommand::TextCompositionPending);
>         if (target)
>-            target->dispatchEvent(CompositionEvent::create(eventNames().compositionendEvent, document().domWindow(), text));
>+            target->dispatchEvent(CompositionEvent::create(eventNames().compositionendEvent, document().windowProxy(), text));
>     }
> 
>     m_compositionNode = nullptr;
>diff --git a/Source/WebCore/html/HTMLDocument.cpp b/Source/WebCore/html/HTMLDocument.cpp
>index a3d7d9770cebd0628ca7bec24cfa675d3b97bb54..9d581cedfa841e0adf1aac432591c8b6f2f76518 100644
>--- a/Source/WebCore/html/HTMLDocument.cpp
>+++ b/Source/WebCore/html/HTMLDocument.cpp
>@@ -114,7 +114,7 @@ Ref<DocumentParser> HTMLDocument::createParser()
> }
> 
> // https://html.spec.whatwg.org/multipage/dom.html#dom-document-nameditem
>-std::optional<Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>>> HTMLDocument::namedItem(const AtomicString& name)
>+std::optional<Variant<RefPtr<WindowProxy>, RefPtr<Element>, RefPtr<HTMLCollection>>> HTMLDocument::namedItem(const AtomicString& name)
> {
>     if (name.isNull() || !hasDocumentNamedItem(*name.impl()))
>         return std::nullopt;
>@@ -122,16 +122,16 @@ std::optional<Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>
>     if (UNLIKELY(documentNamedItemContainsMultipleElements(*name.impl()))) {
>         auto collection = documentNamedItems(name);
>         ASSERT(collection->length() > 1);
>-        return Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>> { RefPtr<HTMLCollection> { WTFMove(collection) } };
>+        return Variant<RefPtr<WindowProxy>, RefPtr<Element>, RefPtr<HTMLCollection>> { RefPtr<HTMLCollection> { WTFMove(collection) } };
>     }
> 
>     auto& element = *documentNamedItem(*name.impl());
>     if (UNLIKELY(is<HTMLIFrameElement>(element))) {
>         if (auto domWindow = makeRefPtr(downcast<HTMLIFrameElement>(element).contentWindow()))
>-            return Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>> { WTFMove(domWindow) };
>+            return Variant<RefPtr<WindowProxy>, RefPtr<Element>, RefPtr<HTMLCollection>> { WTFMove(domWindow) };
>     }
> 
>-    return Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>> { RefPtr<Element> { &element } };
>+    return Variant<RefPtr<WindowProxy>, RefPtr<Element>, RefPtr<HTMLCollection>> { RefPtr<Element> { &element } };
> }
> 
> Vector<AtomicString> HTMLDocument::supportedPropertyNames() const
>diff --git a/Source/WebCore/html/HTMLDocument.h b/Source/WebCore/html/HTMLDocument.h
>index a36397406d349f576f489d3a1f600ada1bddcfe1..0b3d3414a4befa0335c4e229a59585eb05ebd60a 100644
>--- a/Source/WebCore/html/HTMLDocument.h
>+++ b/Source/WebCore/html/HTMLDocument.h
>@@ -44,7 +44,7 @@ public:
>     WEBCORE_EXPORT int width();
>     WEBCORE_EXPORT int height();
>     
>-    std::optional<Variant<RefPtr<DOMWindow>, RefPtr<Element>, RefPtr<HTMLCollection>>> namedItem(const AtomicString&);
>+    std::optional<Variant<RefPtr<WindowProxy>, RefPtr<Element>, RefPtr<HTMLCollection>>> namedItem(const AtomicString&);
>     Vector<AtomicString> supportedPropertyNames() const;
> 
>     Element* documentNamedItem(const AtomicStringImpl& name) const { return m_documentNamedItem.getElementByDocumentNamedItem(name, *this); }
>diff --git a/Source/WebCore/html/HTMLDocument.idl b/Source/WebCore/html/HTMLDocument.idl
>index 127f2645e0322dc798812804ff5d795dac8a580f..a999b03f6228b25ebd1b7b94386b99e395b85f8a 100644
>--- a/Source/WebCore/html/HTMLDocument.idl
>+++ b/Source/WebCore/html/HTMLDocument.idl
>@@ -23,5 +23,5 @@
>     NewImpurePropertyFiresWatchpoints,
>     OverrideBuiltins,
> ] interface HTMLDocument : Document {    
>-    getter (DOMWindow or Element or HTMLCollection) (DOMString name);
>+    getter (WindowProxy or Element or HTMLCollection) (DOMString name);
> };
>diff --git a/Source/WebCore/html/HTMLFrameElement.idl b/Source/WebCore/html/HTMLFrameElement.idl
>index cd63a212ad43314c5be2304dde70097c7bf88353..ed7c0b6e277299b65ca218f21e18261e513dfc0c 100644
>--- a/Source/WebCore/html/HTMLFrameElement.idl
>+++ b/Source/WebCore/html/HTMLFrameElement.idl
>@@ -26,7 +26,7 @@ interface HTMLFrameElement : HTMLElement {
>     [Reflect, URL] attribute USVString longDesc;
>     [Reflect] attribute boolean noResize;
>     [CheckSecurityForNode] readonly attribute Document contentDocument;
>-    readonly attribute DOMWindow contentWindow;
>+    readonly attribute WindowProxy contentWindow;
> 
>     [Reflect] attribute [TreatNullAs=EmptyString] DOMString marginHeight;
>     [Reflect] attribute [TreatNullAs=EmptyString] DOMString marginWidth;
>diff --git a/Source/WebCore/html/HTMLFrameOwnerElement.cpp b/Source/WebCore/html/HTMLFrameOwnerElement.cpp
>index 588739847cbb08c3717c13bebd3aa91d99bb4cc5..b9bef1763e261d7c982e1f055509c169df840606 100644
>--- a/Source/WebCore/html/HTMLFrameOwnerElement.cpp
>+++ b/Source/WebCore/html/HTMLFrameOwnerElement.cpp
>@@ -99,9 +99,9 @@ Document* HTMLFrameOwnerElement::contentDocument() const
>     return m_contentFrame ? m_contentFrame->document() : nullptr;
> }
> 
>-DOMWindow* HTMLFrameOwnerElement::contentWindow() const
>+WindowProxy* HTMLFrameOwnerElement::contentWindow() const
> {
>-    return m_contentFrame ? m_contentFrame->document()->domWindow() : nullptr;
>+    return m_contentFrame ? &m_contentFrame->windowProxy() : nullptr;
> }
> 
> void HTMLFrameOwnerElement::setSandboxFlags(SandboxFlags flags)
>diff --git a/Source/WebCore/html/HTMLFrameOwnerElement.h b/Source/WebCore/html/HTMLFrameOwnerElement.h
>index 865eddb91f57e345b4b687f760e83325425c4fc1..80f18200df0d4a74d7f0e3dbca1524560224ab39 100644
>--- a/Source/WebCore/html/HTMLFrameOwnerElement.h
>+++ b/Source/WebCore/html/HTMLFrameOwnerElement.h
>@@ -37,7 +37,7 @@ public:
>     virtual ~HTMLFrameOwnerElement();
> 
>     Frame* contentFrame() const { return m_contentFrame; }
>-    WEBCORE_EXPORT DOMWindow* contentWindow() const;
>+    WEBCORE_EXPORT WindowProxy* contentWindow() const;
>     WEBCORE_EXPORT Document* contentDocument() const;
> 
>     void setContentFrame(Frame*);
>diff --git a/Source/WebCore/html/HTMLFrameSetElement.cpp b/Source/WebCore/html/HTMLFrameSetElement.cpp
>index 2856424950a349c9b729503c5f4f121a8ec4b2b7..5d237d4826c72f887b7db2fb51d6e97865679a99 100644
>--- a/Source/WebCore/html/HTMLFrameSetElement.cpp
>+++ b/Source/WebCore/html/HTMLFrameSetElement.cpp
>@@ -231,15 +231,13 @@ void HTMLFrameSetElement::removedFromAncestor(RemovalType removalType, Container
>     }
> }
> 
>-DOMWindow* HTMLFrameSetElement::namedItem(const AtomicString& name)
>+WindowProxy* HTMLFrameSetElement::namedItem(const AtomicString& name)
> {
>     auto frameElement = makeRefPtr(children()->namedItem(name));
>     if (!is<HTMLFrameElement>(frameElement))
>         return nullptr;
> 
>-    if (auto document = makeRefPtr(downcast<HTMLFrameElement>(frameElement.get())->contentDocument()))
>-        return document->domWindow();
>-    return nullptr;
>+    return downcast<HTMLFrameElement>(*frameElement).contentWindow();
> }
> 
> Vector<AtomicString> HTMLFrameSetElement::supportedPropertyNames() const
>diff --git a/Source/WebCore/html/HTMLFrameSetElement.h b/Source/WebCore/html/HTMLFrameSetElement.h
>index d1f379b735cb77f5e5ad2dec4ebf1440c7eea332..c3c68b57bf977e7acea92ff3aec096496f7122b2 100644
>--- a/Source/WebCore/html/HTMLFrameSetElement.h
>+++ b/Source/WebCore/html/HTMLFrameSetElement.h
>@@ -48,7 +48,7 @@ public:
>     static RefPtr<HTMLFrameSetElement> findContaining(Element* descendant);
>     
>     Vector<AtomicString> supportedPropertyNames() const;
>-    DOMWindow* namedItem(const AtomicString&);
>+    WindowProxy* namedItem(const AtomicString&);
> 
> private:
>     HTMLFrameSetElement(const QualifiedName&, Document&);
>diff --git a/Source/WebCore/html/HTMLFrameSetElement.idl b/Source/WebCore/html/HTMLFrameSetElement.idl
>index 3250b9490edb8bb18f47b982cbb7f6b4408d3125..6942173e74409249c205b0b3c52629e2acc4694e 100644
>--- a/Source/WebCore/html/HTMLFrameSetElement.idl
>+++ b/Source/WebCore/html/HTMLFrameSetElement.idl
>@@ -33,7 +33,7 @@ interface HTMLFrameSetElement : HTMLElement {
> 
>     // Non-standard named getter
>     // FIXME: This is not in the standard, can we remove this?
>-    getter DOMWindow (DOMString name);
>+    getter WindowProxy (DOMString name);
> };
> 
> HTMLFrameSetElement implements WindowEventHandlers;
>diff --git a/Source/WebCore/html/HTMLIFrameElement.idl b/Source/WebCore/html/HTMLIFrameElement.idl
>index 3e3bdcc1104188a78ddba8e276434e4e66e690bc..c163922ee420e75c04dd128194b535f383c95d09 100644
>--- a/Source/WebCore/html/HTMLIFrameElement.idl
>+++ b/Source/WebCore/html/HTMLIFrameElement.idl
>@@ -38,7 +38,7 @@ interface HTMLIFrameElement : HTMLElement {
> 
>     [CheckSecurityForNode] readonly attribute Document contentDocument;
> 
>-    readonly attribute DOMWindow contentWindow;
>+    readonly attribute WindowProxy contentWindow;
> 
>     [CheckSecurityForNode, MayThrowException] Document getSVGDocument();
> };
>diff --git a/Source/WebCore/html/ImageDocument.cpp b/Source/WebCore/html/ImageDocument.cpp
>index d151273a359493e1b6c538f0f3d9316880364a17..85c13ff7f020aa9ac2c6e4df17246d44119c5a57 100644
>--- a/Source/WebCore/html/ImageDocument.cpp
>+++ b/Source/WebCore/html/ImageDocument.cpp
>@@ -28,6 +28,7 @@
> #include "CachedImage.h"
> #include "Chrome.h"
> #include "ChromeClient.h"
>+#include "DOMWindow.h"
> #include "DocumentLoader.h"
> #include "EventListener.h"
> #include "EventNames.h"
>diff --git a/Source/WebCore/page/DOMWindow.cpp b/Source/WebCore/page/DOMWindow.cpp
>index b023a4e2ef2843037be5d08bf2a4fe3831d5fd8f..3e2a9166f2c801ae55663bccb1b490ae09faf1b2 100644
>--- a/Source/WebCore/page/DOMWindow.cpp
>+++ b/Source/WebCore/page/DOMWindow.cpp
>@@ -148,7 +148,7 @@ using namespace Inspector;
> 
> class PostMessageTimer : public TimerBase {
> public:
>-    PostMessageTimer(DOMWindow& window, MessageWithMessagePorts&& message, const String& sourceOrigin, DOMWindow& source, RefPtr<SecurityOrigin>&& targetOrigin, RefPtr<ScriptCallStack>&& stackTrace)
>+    PostMessageTimer(DOMWindow& window, MessageWithMessagePorts&& message, const String& sourceOrigin, RefPtr<WindowProxy>&& source, RefPtr<SecurityOrigin>&& targetOrigin, RefPtr<ScriptCallStack>&& stackTrace)
>         : m_window(window)
>         , m_message(WTFMove(message))
>         , m_origin(sourceOrigin)
>@@ -161,7 +161,7 @@ public:
> 
>     Ref<MessageEvent> event(ScriptExecutionContext& context)
>     {
>-        return MessageEvent::create(MessagePort::entanglePorts(context, WTFMove(m_message.transferredPorts)), m_message.message.releaseNonNull(), m_origin, { }, MessageEventSource(RefPtr<DOMWindow>(WTFMove(m_source))));
>+        return MessageEvent::create(MessagePort::entanglePorts(context, WTFMove(m_message.transferredPorts)), m_message.message.releaseNonNull(), m_origin, { }, m_source ? std::make_optional(MessageEventSource(WTFMove(m_source))) : std::nullopt);
>     }
> 
>     SecurityOrigin* targetOrigin() const { return m_targetOrigin.get(); }
>@@ -180,7 +180,7 @@ private:
>     Ref<DOMWindow> m_window;
>     MessageWithMessagePorts m_message;
>     String m_origin;
>-    Ref<DOMWindow> m_source;
>+    RefPtr<WindowProxy> m_source;
>     RefPtr<SecurityOrigin> m_targetOrigin;
>     RefPtr<ScriptCallStack> m_stackTrace;
>     RefPtr<UserGestureToken> m_userGestureToForward;
>@@ -960,7 +960,8 @@ ExceptionOr<void> DOMWindow::postMessage(JSC::ExecState& state, DOMWindow& incum
>     MessageWithMessagePorts message { messageData.releaseReturnValue(), disentangledPorts.releaseReturnValue() };
> 
>     // Schedule the message.
>-    auto* timer = new PostMessageTimer(*this, WTFMove(message), sourceOrigin, incumbentWindow, WTFMove(target), WTFMove(stackTrace));
>+    RefPtr<WindowProxy> incumbentWindowProxy = incumbentWindow.frame() ? &incumbentWindow.frame()->windowProxy() : nullptr;
>+    auto* timer = new PostMessageTimer(*this, WTFMove(message), sourceOrigin, WTFMove(incumbentWindowProxy), WTFMove(target), WTFMove(stackTrace));
>     timer->startOneShot(0_s);
> 
>     InspectorInstrumentation::didPostMessage(*m_frame, *timer, state);
>diff --git a/Source/WebCore/page/DragController.cpp b/Source/WebCore/page/DragController.cpp
>index 9174afd53216c112c4b5e0d57587c86d1fc9c5a1..37f8f06b4f63415c3e63f672b5114f57736f7ad5 100644
>--- a/Source/WebCore/page/DragController.cpp
>+++ b/Source/WebCore/page/DragController.cpp
>@@ -508,7 +508,7 @@ bool DragController::dispatchTextInputEventFor(Frame* innerFrame, const DragData
>     String text = m_page.dragCaretController().isContentRichlyEditable() ? emptyString() : dragData.asPlainText();
>     Element* target = innerFrame->editor().findEventTargetFrom(m_page.dragCaretController().caretPosition());
>     // FIXME: What guarantees target is not null?
>-    auto event = TextEvent::createForDrop(innerFrame->document()->domWindow(), text);
>+    auto event = TextEvent::createForDrop(&innerFrame->windowProxy(), text);
>     target->dispatchEvent(event);
>     return !event->defaultPrevented();
> }
>diff --git a/Source/WebCore/page/EventHandler.cpp b/Source/WebCore/page/EventHandler.cpp
>index 87d12774cc6f34ae070100d19eeb76565f25079d..8b3c6d1af8f8541da3e5a74450ba85b4c6343be0 100644
>--- a/Source/WebCore/page/EventHandler.cpp
>+++ b/Source/WebCore/page/EventHandler.cpp
>@@ -2198,7 +2198,7 @@ bool EventHandler::dispatchDragEvent(const AtomicString& eventType, Element& dra
> 
>     view->disableLayerFlushThrottlingTemporarilyForInteraction();
>     Ref<MouseEvent> me = MouseEvent::create(eventType,
>-        true, true, event.timestamp().approximateMonotonicTime(), m_frame.document()->defaultView(),
>+        true, true, event.timestamp().approximateMonotonicTime(), &m_frame.windowProxy(),
>         0, event.globalPosition().x(), event.globalPosition().y(), event.position().x(), event.position().y(),
> #if ENABLE(POINTER_LOCK)
>         event.movementDelta().x(), event.movementDelta().y(),
>@@ -3248,7 +3248,7 @@ bool EventHandler::internalKeyEvent(const PlatformKeyboardEvent& initialKeyEvent
>     PlatformKeyboardEvent keyDownEvent = initialKeyEvent;    
>     if (keyDownEvent.type() != PlatformEvent::RawKeyDown)
>         keyDownEvent.disambiguateKeyDownEvent(PlatformEvent::RawKeyDown, backwardCompatibilityMode);
>-    auto keydown = KeyboardEvent::create(keyDownEvent, m_frame.document()->defaultView());
>+    auto keydown = KeyboardEvent::create(keyDownEvent, &m_frame.windowProxy());
>     if (matchedAnAccessKey)
>         keydown->preventDefault();
>     keydown->setTarget(element);
>@@ -3271,7 +3271,7 @@ bool EventHandler::internalKeyEvent(const PlatformKeyboardEvent& initialKeyEvent
>     
>     if (handledByInputMethod) {
>         keyDownEvent.setWindowsVirtualKeyCode(CompositionEventKeyCode);
>-        keydown = KeyboardEvent::create(keyDownEvent, m_frame.document()->defaultView());
>+        keydown = KeyboardEvent::create(keyDownEvent, &m_frame.windowProxy());
>         keydown->setTarget(element);
>         keydown->setDefaultHandled();
>     }
>@@ -3301,7 +3301,7 @@ bool EventHandler::internalKeyEvent(const PlatformKeyboardEvent& initialKeyEvent
>     keyPressEvent.disambiguateKeyDownEvent(PlatformEvent::Char, backwardCompatibilityMode);
>     if (keyPressEvent.text().isEmpty())
>         return keydownResult;
>-    auto keypress = KeyboardEvent::create(keyPressEvent, m_frame.document()->defaultView());
>+    auto keypress = KeyboardEvent::create(keyPressEvent, &m_frame.windowProxy());
>     keypress->setTarget(element);
>     if (keydownResult)
>         keypress->preventDefault();
>@@ -3802,7 +3802,7 @@ bool EventHandler::handleTextInputEvent(const String& text, Event* underlyingEve
>     if (FrameView* view = m_frame.view())
>         view->disableLayerFlushThrottlingTemporarilyForInteraction();
> 
>-    Ref<TextEvent> event = TextEvent::create(m_frame.document()->domWindow(), text, inputType);
>+    auto event = TextEvent::create(&m_frame.windowProxy(), text, inputType);
>     event->setUnderlyingEvent(underlyingEvent);
> 
>     target->dispatchEvent(event);
>@@ -4211,7 +4211,7 @@ bool EventHandler::handleTouchEvent(const PlatformTouchEvent& event)
> 
>             Ref<TouchEvent> touchEvent =
>                 TouchEvent::create(effectiveTouches.get(), targetTouches.get(), changedTouches[state].m_touches.get(),
>-                    stateName, downcast<Node>(*target).document().defaultView(),
>+                    stateName, downcast<Node>(*target).document().windowProxy(),
>                     0, 0, 0, 0, event.ctrlKey(), event.altKey(), event.shiftKey(), event.metaKey());
>             target->dispatchEvent(touchEvent);
>             swallowedEvent = swallowedEvent || touchEvent->defaultPrevented() || touchEvent->defaultHandled();
>diff --git a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMDOMWindow.cpp b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMDOMWindow.cpp
>index 7b09c8187c464006706fc3eca477b6970365ba22..677d66c12544831417d4d814447f405b1b5303d6 100644
>--- a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMDOMWindow.cpp
>+++ b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMDOMWindow.cpp
>@@ -64,6 +64,22 @@ WebKitDOMDOMWindow* kit(WebCore::DOMWindow* obj)
>     return wrapDOMWindow(obj);
> }
> 
>+WebKitDOMDOMWindow* kit(WebCore::WindowProxy* windowProxy)
>+{
>+    if (!windowProxy || !is<WebCore::DOMWindow>(windowProxy->window()))
>+        return nullptr;
>+
>+    return kit(downcast<WebCore::DOMWindow>(windowProxy->window()));
>+}
>+
>+WebCore::WindowProxy* toWindowProxy(WebKitDOMDOMWindow* view)
>+{
>+    auto* window = core(view);
>+    if (!window || !window->frame())
>+        return nullptr;
>+    return &window->frame()->windowProxy();
>+}
>+
> WebCore::DOMWindow* core(WebKitDOMDOMWindow* request)
> {
>     return request ? static_cast<WebCore::DOMWindow*>(WEBKIT_DOM_OBJECT(request)->coreObject) : 0;
>diff --git a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMDOMWindowPrivate.h b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMDOMWindowPrivate.h
>index e31d2275b8b81caf80e201e6dd6b1ae962ccff92..6684ec6788edefb0e86d5dd154268e6fd35f6068 100644
>--- a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMDOMWindowPrivate.h
>+++ b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMDOMWindowPrivate.h
>@@ -21,12 +21,15 @@
> #define WebKitDOMDOMWindowPrivate_h
> 
> #include <WebCore/DOMWindow.h>
>+#include <WebCore/WindowProxy.h>
> #include <webkitdom/WebKitDOMDOMWindow.h>
> 
> namespace WebKit {
> WebKitDOMDOMWindow* wrapDOMWindow(WebCore::DOMWindow*);
> WebKitDOMDOMWindow* kit(WebCore::DOMWindow*);
>+WebKitDOMDOMWindow* kit(WebCore::WindowProxy*);
> WebCore::DOMWindow* core(WebKitDOMDOMWindow*);
>+WebCore::WindowProxy* toWindowProxy(WebKitDOMDOMWindow*);
> } // namespace WebKit
> 
> #endif /* WebKitDOMDOMWindowPrivate_h */
>diff --git a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMDocumentGtk.cpp b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMDocumentGtk.cpp
>index 950541f09b22701a1395581cd1b4329703421ea4..0557aa6ca85d033ed1f31613f01d896608722b94 100644
>--- a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMDocumentGtk.cpp
>+++ b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMDocumentGtk.cpp
>@@ -1494,8 +1494,7 @@ WebKitDOMDOMWindow* webkit_dom_document_get_default_view(WebKitDOMDocument* self
>     WebCore::JSMainThreadNullState state;
>     g_return_val_if_fail(WEBKIT_DOM_IS_DOCUMENT(self), 0);
>     WebCore::Document* item = WebKit::core(self);
>-    RefPtr<WebCore::DOMWindow> gobjectResult = WTF::getPtr(item->defaultView());
>-    return WebKit::kit(gobjectResult.get());
>+    return WebKit::kit(item->windowProxy());
> }
> 
> WebKitDOMStyleSheetList* webkit_dom_document_get_style_sheets(WebKitDOMDocument* self)
>diff --git a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMHTMLFrameElement.cpp b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMHTMLFrameElement.cpp
>index c15f6a4864f783ec0736b4ca3796c6dd66b3762a..5b6715238c6939aa7cd9076c25b99251c6d15548 100644
>--- a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMHTMLFrameElement.cpp
>+++ b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMHTMLFrameElement.cpp
>@@ -492,8 +492,7 @@ WebKitDOMDOMWindow* webkit_dom_html_frame_element_get_content_window(WebKitDOMHT
>     WebCore::JSMainThreadNullState state;
>     g_return_val_if_fail(WEBKIT_DOM_IS_HTML_FRAME_ELEMENT(self), 0);
>     WebCore::HTMLFrameElement* item = WebKit::core(self);
>-    RefPtr<WebCore::DOMWindow> gobjectResult = WTF::getPtr(item->contentWindow());
>-    return WebKit::kit(gobjectResult.get());
>+    return WebKit::kit(item->contentWindow());
> }
> 
> glong webkit_dom_html_frame_element_get_width(WebKitDOMHTMLFrameElement* self)
>diff --git a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMHTMLIFrameElement.cpp b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMHTMLIFrameElement.cpp
>index 28b51ce90e9f3f5040db161766e7604bcf4dff94..3e674af2f1520722068238795b85d547f22516c5 100644
>--- a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMHTMLIFrameElement.cpp
>+++ b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMHTMLIFrameElement.cpp
>@@ -538,8 +538,7 @@ WebKitDOMDOMWindow* webkit_dom_html_iframe_element_get_content_window(WebKitDOMH
>     WebCore::JSMainThreadNullState state;
>     g_return_val_if_fail(WEBKIT_DOM_IS_HTML_IFRAME_ELEMENT(self), 0);
>     WebCore::HTMLIFrameElement* item = WebKit::core(self);
>-    RefPtr<WebCore::DOMWindow> gobjectResult = WTF::getPtr(item->contentWindow());
>-    return WebKit::kit(gobjectResult.get());
>+    return WebKit::kit(item->contentWindow());
> }
> 
> G_GNUC_END_IGNORE_DEPRECATIONS;
>diff --git a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMKeyboardEvent.cpp b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMKeyboardEvent.cpp
>index 41fcc978343d4238dc6b51a704398af73abc82d0..7da3263f0be32a516b0c9c3aaff18480335120cc 100644
>--- a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMKeyboardEvent.cpp
>+++ b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMKeyboardEvent.cpp
>@@ -202,9 +202,8 @@ void webkit_dom_keyboard_event_init_keyboard_event(WebKitDOMKeyboardEvent* self,
>     g_return_if_fail(keyIdentifier);
>     WebCore::KeyboardEvent* item = WebKit::core(self);
>     WTF::String convertedType = WTF::String::fromUTF8(type);
>-    WebCore::DOMWindow* convertedView = WebKit::core(view);
>     WTF::String convertedKeyIdentifier = WTF::String::fromUTF8(keyIdentifier);
>-    item->initKeyboardEvent(convertedType, canBubble, cancelable, convertedView, convertedKeyIdentifier, location, ctrlKey, altKey, shiftKey, metaKey, altGraphKey);
>+    item->initKeyboardEvent(convertedType, canBubble, cancelable, WebKit::toWindowProxy(view), convertedKeyIdentifier, location, ctrlKey, altKey, shiftKey, metaKey, altGraphKey);
> }
> 
> gchar* webkit_dom_keyboard_event_get_key_identifier(WebKitDOMKeyboardEvent* self)
>diff --git a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMMouseEvent.cpp b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMMouseEvent.cpp
>index 05800a357fac674db8c3d3365e1ce5c6965b6728..217e565a4ab8631eed2f511511146d6a2018ec8d 100644
>--- a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMMouseEvent.cpp
>+++ b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMMouseEvent.cpp
>@@ -319,9 +319,8 @@ void webkit_dom_mouse_event_init_mouse_event(WebKitDOMMouseEvent* self, const gc
>     g_return_if_fail(WEBKIT_DOM_IS_EVENT_TARGET(relatedTarget));
>     WebCore::MouseEvent* item = WebKit::core(self);
>     WTF::String convertedType = WTF::String::fromUTF8(type);
>-    WebCore::DOMWindow* convertedView = WebKit::core(view);
>     WebCore::EventTarget* convertedRelatedTarget = WebKit::core(relatedTarget);
>-    item->initMouseEvent(convertedType, canBubble, cancelable, convertedView, detail, screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey, button, convertedRelatedTarget);
>+    item->initMouseEvent(convertedType, canBubble, cancelable, WebKit::toWindowProxy(view), detail, screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey, button, convertedRelatedTarget);
> }
> 
> glong webkit_dom_mouse_event_get_screen_x(WebKitDOMMouseEvent* self)
>diff --git a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMUIEvent.cpp b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMUIEvent.cpp
>index 9ae01239a826cf8ef2d40620d5c4374b60249dfc..a0f6a90104d0eea3dff399517fc88b84b3914b4c 100644
>--- a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMUIEvent.cpp
>+++ b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMUIEvent.cpp
>@@ -204,8 +204,7 @@ void webkit_dom_ui_event_init_ui_event(WebKitDOMUIEvent* self, const gchar* type
>     g_return_if_fail(WEBKIT_DOM_IS_DOM_WINDOW(view));
>     WebCore::UIEvent* item = WebKit::core(self);
>     WTF::String convertedType = WTF::String::fromUTF8(type);
>-    WebCore::DOMWindow* convertedView = WebKit::core(view);
>-    item->initUIEvent(convertedType, canBubble, cancelable, convertedView, detail);
>+    item->initUIEvent(convertedType, canBubble, cancelable, WebKit::toWindowProxy(view), detail);
> }
> 
> WebKitDOMDOMWindow* webkit_dom_ui_event_get_view(WebKitDOMUIEvent* self)
>@@ -213,8 +212,7 @@ WebKitDOMDOMWindow* webkit_dom_ui_event_get_view(WebKitDOMUIEvent* self)
>     WebCore::JSMainThreadNullState state;
>     g_return_val_if_fail(WEBKIT_DOM_IS_UI_EVENT(self), 0);
>     WebCore::UIEvent* item = WebKit::core(self);
>-    RefPtr<WebCore::DOMWindow> gobjectResult = WTF::getPtr(item->view());
>-    return WebKit::kit(gobjectResult.get());
>+    return WebKit::kit(item->view());
> }
> 
> glong webkit_dom_ui_event_get_detail(WebKitDOMUIEvent* self)
>diff --git a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMWheelEvent.cpp b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMWheelEvent.cpp
>index 0e1ba6da55c1c43eee64ae9a1ed5ab6444f9f4f9..e774cd167ecb3491141908e389dd50a25446cead 100644
>--- a/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMWheelEvent.cpp
>+++ b/Source/WebKit/WebProcess/InjectedBundle/API/gtk/DOM/WebKitDOMWheelEvent.cpp
>@@ -131,8 +131,7 @@ void webkit_dom_wheel_event_init_wheel_event(WebKitDOMWheelEvent* self, glong wh
>     g_return_if_fail(WEBKIT_DOM_IS_WHEEL_EVENT(self));
>     g_return_if_fail(WEBKIT_DOM_IS_DOM_WINDOW(view));
>     WebCore::WheelEvent* item = WebKit::core(self);
>-    WebCore::DOMWindow* convertedView = WebKit::core(view);
>-    item->initWebKitWheelEvent(wheelDeltaX, wheelDeltaY, convertedView, screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey);
>+    item->initWebKitWheelEvent(wheelDeltaX, wheelDeltaY, WebKit::toWindowProxy(view), screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey);
> }
> 
> glong webkit_dom_wheel_event_get_wheel_delta_x(WebKitDOMWheelEvent* self)
>diff --git a/Source/WebKit/WebProcess/Plugins/PDF/PDFPlugin.mm b/Source/WebKit/WebProcess/Plugins/PDF/PDFPlugin.mm
>index 48166768f14158f02203e2b0b925d072cf533804..a749ea6349782ddbbda30032b86d1bc75c0d6277 100644
>--- a/Source/WebKit/WebProcess/Plugins/PDF/PDFPlugin.mm
>+++ b/Source/WebKit/WebProcess/Plugins/PDF/PDFPlugin.mm
>@@ -1680,7 +1680,7 @@ void PDFPlugin::clickedLink(NSURL *url)
> 
>     RefPtr<Event> coreEvent;
>     if (m_lastMouseEvent.type() != WebEvent::NoType)
>-        coreEvent = MouseEvent::create(eventNames().clickEvent, frame->document()->defaultView(), platform(m_lastMouseEvent), 0, 0);
>+        coreEvent = MouseEvent::create(eventNames().clickEvent, &frame->windowProxy(), platform(m_lastMouseEvent), 0, 0);
> 
>     frame->loader().urlSelected(coreURL, emptyString(), coreEvent.get(), LockHistory::No, LockBackForwardList::No, MaybeSendReferrer, ShouldOpenExternalURLsPolicy::ShouldAllow);
> }
>diff --git a/Source/WebKit/WebProcess/WebPage/WebPage.cpp b/Source/WebKit/WebProcess/WebPage/WebPage.cpp
>index e4243c073da6469c4b7666fcba031a98c29fc495..8b4ce5dc1080d90b8e6555de11251a19fd4ed481 100644
>--- a/Source/WebKit/WebProcess/WebPage/WebPage.cpp
>+++ b/Source/WebKit/WebProcess/WebPage/WebPage.cpp
>@@ -2729,7 +2729,7 @@ void WebPage::setInitialFocus(bool forward, bool isKeyboardEventValid, const Web
>     if (isKeyboardEventValid && event.type() == WebEvent::KeyDown) {
>         PlatformKeyboardEvent platformEvent(platform(event));
>         platformEvent.disambiguateKeyDownEvent(PlatformEvent::RawKeyDown);
>-        m_page->focusController().setInitialFocus(forward ? FocusDirectionForward : FocusDirectionBackward, &KeyboardEvent::create(platformEvent, frame.document()->defaultView()).get());
>+        m_page->focusController().setInitialFocus(forward ? FocusDirectionForward : FocusDirectionBackward, &KeyboardEvent::create(platformEvent, &frame.windowProxy()).get());
> 
>         send(Messages::WebPageProxy::VoidCallback(callbackID));
>         return;
>diff --git a/Source/WebKitLegacy/mac/DOM/DOMAbstractView.mm b/Source/WebKitLegacy/mac/DOM/DOMAbstractView.mm
>index 1a4c29b1b0ddac82257bd6f4ba6dc44ff3912e89..169e4ae5fe775b98d24cd4806a5a9c5078e10e09 100644
>--- a/Source/WebKitLegacy/mac/DOM/DOMAbstractView.mm
>+++ b/Source/WebKitLegacy/mac/DOM/DOMAbstractView.mm
>@@ -36,6 +36,7 @@
> #import <WebCore/Frame.h>
> #import <WebCore/ThreadCheck.h>
> #import <WebCore/WebScriptObjectPrivate.h>
>+#import <WebCore/WindowProxy.h>
> 
> #define IMPL reinterpret_cast<WebCore::Frame*>(_internal)
> 
>@@ -100,3 +101,19 @@ DOMAbstractView *kit(WebCore::AbstractDOMWindow* value)
> 
>     return kit(downcast<WebCore::DOMWindow>(value));
> }
>+
>+DOMAbstractView *kit(WebCore::WindowProxy* windowProxy)
>+{
>+    if (!windowProxy)
>+        return nil;
>+
>+    return kit(windowProxy->window());
>+}
>+
>+WebCore::WindowProxy* toWindowProxy(DOMAbstractView *view)
>+{
>+    auto* window = core(view);
>+    if (!window || !window->frame())
>+        return nil;
>+    return &window->frame()->windowProxy();
>+}
>diff --git a/Source/WebKitLegacy/mac/DOM/DOMAbstractViewInternal.h b/Source/WebKitLegacy/mac/DOM/DOMAbstractViewInternal.h
>index c4d7325c7f25bb5b86127416e3d90d28214c1197..359f05eb4d4a43aa524233e4bbf6628db36886ee 100644
>--- a/Source/WebKitLegacy/mac/DOM/DOMAbstractViewInternal.h
>+++ b/Source/WebKitLegacy/mac/DOM/DOMAbstractViewInternal.h
>@@ -28,11 +28,14 @@
> namespace WebCore {
> class AbstractDOMWindow;
> class DOMWindow;
>+class WindowProxy;
> }
> 
> WebCore::DOMWindow* core(DOMAbstractView *);
> DOMAbstractView *kit(WebCore::DOMWindow*);
> DOMAbstractView *kit(WebCore::AbstractDOMWindow*);
>+DOMAbstractView *kit(WebCore::WindowProxy*);
>+WebCore::WindowProxy* toWindowProxy(DOMAbstractView *);
> 
> @interface DOMAbstractView (WebKitLegacyInternal)
> - (void)_disconnectFrame;
>diff --git a/Source/WebKitLegacy/mac/DOM/DOMDocument.mm b/Source/WebKitLegacy/mac/DOM/DOMDocument.mm
>index 6c2f36d824a94a6823bf2a81c9bed2234e7a68f4..30b8c4535485b5631e1aeb66e45b05e5f1c17cf7 100644
>--- a/Source/WebKitLegacy/mac/DOM/DOMDocument.mm
>+++ b/Source/WebKitLegacy/mac/DOM/DOMDocument.mm
>@@ -162,7 +162,7 @@ - (void)setDocumentURI:(NSString *)newDocumentURI
> - (DOMAbstractView *)defaultView
> {
>     WebCore::JSMainThreadNullState state;
>-    return kit(WTF::getPtr(IMPL->defaultView()));
>+    return kit(WTF::getPtr(IMPL->windowProxy()));
> }
> 
> - (DOMStyleSheetList *)styleSheets
>@@ -684,7 +684,7 @@ - (DOMCSSStyleDeclaration *)getComputedStyle:(DOMElement *)element pseudoElement
>     WebCore::JSMainThreadNullState state;
>     if (!element)
>         raiseTypeErrorException();
>-    WebCore::DOMWindow* dv = IMPL->defaultView();
>+    WebCore::DOMWindow* dv = IMPL->domWindow();
>     if (!dv)
>         return nil;
>     return kit(WTF::getPtr(dv->getComputedStyle(*core(element), pseudoElement)));
>@@ -698,7 +698,7 @@ - (DOMCSSRuleList *)getMatchedCSSRules:(DOMElement *)element pseudoElement:(NSSt
> - (DOMCSSRuleList *)getMatchedCSSRules:(DOMElement *)element pseudoElement:(NSString *)pseudoElement authorOnly:(BOOL)authorOnly
> {
>     WebCore::JSMainThreadNullState state;
>-    WebCore::DOMWindow* dv = IMPL->defaultView();
>+    WebCore::DOMWindow* dv = IMPL->domWindow();
>     if (!dv)
>         return nil;
>     return kit(WTF::getPtr(dv->getMatchedCSSRules(core(element), pseudoElement, authorOnly)));
>diff --git a/Source/WebKitLegacy/mac/DOM/DOMKeyboardEvent.mm b/Source/WebKitLegacy/mac/DOM/DOMKeyboardEvent.mm
>index e9ab1fefe74d9734eac28416b09ef2310fcfc71b..ba2fbe4e189d6136eed735efffe7120b7f96958e 100644
>--- a/Source/WebKitLegacy/mac/DOM/DOMKeyboardEvent.mm
>+++ b/Source/WebKitLegacy/mac/DOM/DOMKeyboardEvent.mm
>@@ -110,25 +110,25 @@ - (BOOL)getModifierState:(NSString *)keyIdentifierArg
> - (void)initKeyboardEvent:(NSString *)type canBubble:(BOOL)canBubble cancelable:(BOOL)cancelable view:(DOMAbstractView *)view keyIdentifier:(NSString *)inKeyIdentifier location:(unsigned)inLocation ctrlKey:(BOOL)inCtrlKey altKey:(BOOL)inAltKey shiftKey:(BOOL)inShiftKey metaKey:(BOOL)inMetaKey altGraphKey:(BOOL)inAltGraphKey
> {
>     WebCore::JSMainThreadNullState state;
>-    IMPL->initKeyboardEvent(type, canBubble, cancelable, core(view), inKeyIdentifier, inLocation, inCtrlKey, inAltKey, inShiftKey, inMetaKey, inAltGraphKey);
>+    IMPL->initKeyboardEvent(type, canBubble, cancelable, toWindowProxy(view), inKeyIdentifier, inLocation, inCtrlKey, inAltKey, inShiftKey, inMetaKey, inAltGraphKey);
> }
> 
> - (void)initKeyboardEvent:(NSString *)type canBubble:(BOOL)canBubble cancelable:(BOOL)cancelable view:(DOMAbstractView *)view keyIdentifier:(NSString *)inKeyIdentifier location:(unsigned)inLocation ctrlKey:(BOOL)inCtrlKey altKey:(BOOL)inAltKey shiftKey:(BOOL)inShiftKey metaKey:(BOOL)inMetaKey
> {
>     WebCore::JSMainThreadNullState state;
>-    IMPL->initKeyboardEvent(type, canBubble, cancelable, core(view), inKeyIdentifier, inLocation, inCtrlKey, inAltKey, inShiftKey, inMetaKey);
>+    IMPL->initKeyboardEvent(type, canBubble, cancelable, toWindowProxy(view), inKeyIdentifier, inLocation, inCtrlKey, inAltKey, inShiftKey, inMetaKey);
> }
> 
> - (void)initKeyboardEvent:(NSString *)type canBubble:(BOOL)canBubble cancelable:(BOOL)cancelable view:(DOMAbstractView *)view keyIdentifier:(NSString *)inKeyIdentifier keyLocation:(unsigned)inKeyLocation ctrlKey:(BOOL)inCtrlKey altKey:(BOOL)inAltKey shiftKey:(BOOL)inShiftKey metaKey:(BOOL)inMetaKey altGraphKey:(BOOL)inAltGraphKey
> {
>     WebCore::JSMainThreadNullState state;
>-    IMPL->initKeyboardEvent(type, canBubble, cancelable, core(view), inKeyIdentifier, inKeyLocation, inCtrlKey, inAltKey, inShiftKey, inMetaKey, inAltGraphKey);
>+    IMPL->initKeyboardEvent(type, canBubble, cancelable, toWindowProxy(view), inKeyIdentifier, inKeyLocation, inCtrlKey, inAltKey, inShiftKey, inMetaKey, inAltGraphKey);
> }
> 
> - (void)initKeyboardEvent:(NSString *)type canBubble:(BOOL)canBubble cancelable:(BOOL)cancelable view:(DOMAbstractView *)view keyIdentifier:(NSString *)inKeyIdentifier keyLocation:(unsigned)inKeyLocation ctrlKey:(BOOL)inCtrlKey altKey:(BOOL)inAltKey shiftKey:(BOOL)inShiftKey metaKey:(BOOL)inMetaKey
> {
>     WebCore::JSMainThreadNullState state;
>-    IMPL->initKeyboardEvent(type, canBubble, cancelable, core(view), inKeyIdentifier, inKeyLocation, inCtrlKey, inAltKey, inShiftKey, inMetaKey);
>+    IMPL->initKeyboardEvent(type, canBubble, cancelable, toWindowProxy(view), inKeyIdentifier, inKeyLocation, inCtrlKey, inAltKey, inShiftKey, inMetaKey);
> }
> 
> @end
>diff --git a/Source/WebKitLegacy/mac/DOM/DOMMouseEvent.mm b/Source/WebKitLegacy/mac/DOM/DOMMouseEvent.mm
>index 7c7e0ddff142161ee48e6777025e7f70e853a813..e515d8935c177d471094a84c5cfb8d64db294389 100644
>--- a/Source/WebKitLegacy/mac/DOM/DOMMouseEvent.mm
>+++ b/Source/WebKitLegacy/mac/DOM/DOMMouseEvent.mm
>@@ -145,7 +145,7 @@ - (void)initMouseEvent:(NSString *)type canBubble:(BOOL)canBubble cancelable:(BO
>     WebCore::JSMainThreadNullState state;
>     DOMNode* inRelatedTargetObjC = inRelatedTarget;
>     WebCore::Node* inRelatedTargetNode = core(inRelatedTargetObjC);
>-    IMPL->initMouseEvent(type, canBubble, cancelable, core(view), detail, inScreenX, inScreenY, inClientX, inClientY, inCtrlKey, inAltKey, inShiftKey, inMetaKey, inButton, inRelatedTargetNode);
>+    IMPL->initMouseEvent(type, canBubble, cancelable, toWindowProxy(view), detail, inScreenX, inScreenY, inClientX, inClientY, inCtrlKey, inAltKey, inShiftKey, inMetaKey, inButton, inRelatedTargetNode);
> }
> 
> @end
>diff --git a/Source/WebKitLegacy/mac/DOM/DOMTextEvent.mm b/Source/WebKitLegacy/mac/DOM/DOMTextEvent.mm
>index 2867bc8023916a7e6780fa3eb7120c9c91ad2a42..dfa762024b56622ce5b2991df312dfd53870d0e3 100644
>--- a/Source/WebKitLegacy/mac/DOM/DOMTextEvent.mm
>+++ b/Source/WebKitLegacy/mac/DOM/DOMTextEvent.mm
>@@ -50,7 +50,7 @@ - (NSString *)data
> - (void)initTextEvent:(NSString *)typeArg canBubbleArg:(BOOL)canBubbleArg cancelableArg:(BOOL)cancelableArg viewArg:(DOMAbstractView *)viewArg dataArg:(NSString *)dataArg
> {
>     WebCore::JSMainThreadNullState state;
>-    IMPL->initTextEvent(typeArg, canBubbleArg, cancelableArg, core(viewArg), dataArg);
>+    IMPL->initTextEvent(typeArg, canBubbleArg, cancelableArg, toWindowProxy(viewArg), dataArg);
> }
> 
> @end
>diff --git a/Source/WebKitLegacy/mac/DOM/DOMUIEvent.mm b/Source/WebKitLegacy/mac/DOM/DOMUIEvent.mm
>index a464dacfbf51266ba92e59771929d8631f2f1640..3dc97b3937847d0acb0e0cd2ea99c91fd126f66d 100644
>--- a/Source/WebKitLegacy/mac/DOM/DOMUIEvent.mm
>+++ b/Source/WebKitLegacy/mac/DOM/DOMUIEvent.mm
>@@ -103,7 +103,7 @@ - (int)which
> - (void)initUIEvent:(NSString *)type canBubble:(BOOL)canBubble cancelable:(BOOL)cancelable view:(DOMAbstractView *)inView detail:(int)inDetail
> {
>     WebCore::JSMainThreadNullState state;
>-    IMPL->initUIEvent(type, canBubble, cancelable, core(inView), inDetail);
>+    IMPL->initUIEvent(type, canBubble, cancelable, toWindowProxy(inView), inDetail);
> }
> 
> @end
>diff --git a/Source/WebKitLegacy/mac/DOM/DOMWheelEvent.mm b/Source/WebKitLegacy/mac/DOM/DOMWheelEvent.mm
>index 8f0569ca6a3f958c741f6d88358fffd160b18ac8..dd4a57b0f32b77b430b6dd9cd5b15234e5a434bb 100644
>--- a/Source/WebKitLegacy/mac/DOM/DOMWheelEvent.mm
>+++ b/Source/WebKitLegacy/mac/DOM/DOMWheelEvent.mm
>@@ -96,7 +96,7 @@ - (BOOL)isHorizontal
> - (void)initWheelEvent:(int)inWheelDeltaX wheelDeltaY:(int)inWheelDeltaY view:(DOMAbstractView *)view screenX:(int)screenX screenY:(int)screenY clientX:(int)clientX clientY:(int)clientY ctrlKey:(BOOL)ctrlKey altKey:(BOOL)altKey shiftKey:(BOOL)shiftKey metaKey:(BOOL)metaKey
> {
>     WebCore::JSMainThreadNullState state;
>-    IMPL->initWebKitWheelEvent(inWheelDeltaX, inWheelDeltaY, core(view), screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey);
>+    IMPL->initWebKitWheelEvent(inWheelDeltaX, inWheelDeltaY, toWindowProxy(view), screenX, screenY, clientX, clientY, ctrlKey, altKey, shiftKey, metaKey);
> }
> 
> @end
>diff --git a/Source/WebKitLegacy/mac/WebView/WebHTMLView.mm b/Source/WebKitLegacy/mac/WebView/WebHTMLView.mm
>index 2b7b9e379c1b888e1c3e124c5db3f2d730b76ee7..41b7bc7a5ce5777d61eda6c093a502fe0cdc0f9e 100644
>--- a/Source/WebKitLegacy/mac/WebView/WebHTMLView.mm
>+++ b/Source/WebKitLegacy/mac/WebView/WebHTMLView.mm
>@@ -4533,10 +4533,10 @@ static RefPtr<KeyboardEvent> currentKeyboardEvent(Frame* coreFrame)
>     case NSEventTypeKeyDown: {
>         PlatformKeyboardEvent platformEvent = PlatformEventFactory::createPlatformKeyboardEvent(event);
>         platformEvent.disambiguateKeyDownEvent(PlatformEvent::RawKeyDown);
>-        return KeyboardEvent::create(platformEvent, coreFrame->document()->defaultView());
>+        return KeyboardEvent::create(platformEvent, &coreFrame->windowProxy());
>     }
>     case NSEventTypeKeyUp:
>-        return KeyboardEvent::create(PlatformEventFactory::createPlatformKeyboardEvent(event), coreFrame->document()->defaultView());
>+        return KeyboardEvent::create(PlatformEventFactory::createPlatformKeyboardEvent(event), &coreFrame->windowProxy());
>     default:
>         return nullptr;
>     }
>@@ -4547,7 +4547,7 @@ static RefPtr<KeyboardEvent> currentKeyboardEvent(Frame* coreFrame)
>     WebEventType type = event.type;
>     if (type == WebEventKeyDown || type == WebEventKeyUp) {
>         Document* document = coreFrame->document();
>-        return KeyboardEvent::create(PlatformEventFactory::createPlatformKeyboardEvent(event), document ? document->defaultView() : 0);
>+        return KeyboardEvent::create(PlatformEventFactory::createPlatformKeyboardEvent(event), document ? document->windowProxy() : 0);
>     }
>     return nullptr;
> #endif
>diff --git a/Source/WebKitLegacy/win/DOMCoreClasses.cpp b/Source/WebKitLegacy/win/DOMCoreClasses.cpp
>index 1b43dd9f4ca135b2d1c4d4c469f868555c47e966..b25261f7dfce1b7cf471a9d1f23cb087b2577a0f 100644
>--- a/Source/WebKitLegacy/win/DOMCoreClasses.cpp
>+++ b/Source/WebKitLegacy/win/DOMCoreClasses.cpp
>@@ -802,7 +802,7 @@ HRESULT DOMDocument::getComputedStyle(_In_opt_ IDOMElement* elt, _In_ BSTR pseud
>     if (!element)
>         return E_FAIL;
> 
>-    WebCore::DOMWindow* dv = m_document->defaultView();
>+    auto* dv = m_document->domWindow();
>     String pseudoEltString(pseudoElt);
>     
>     if (!dv)

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Attachments on bug 185022: 338855 | 338874 | 338877 | 338879 | 338880 | 338884 | 338886 | 338890 | 338895 | 338897 | 338901 | 338902 | 338973 | 338974 | 338976 | 338993