Attachment 92357 Details for Bug 54181 – Patch

[patch] Patch

page_visibility_api.patch (text/plain), 56.15 KB, created by Shishir Agrawal on 2011-05-04 18:46:37 PDT

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Creator: Shishir Agrawal

Created: 2011-05-04 18:46:37 PDT

Size: 56.15 KB

patch

obsolete

>diff --git a/LayoutTests/ChangeLog b/LayoutTests/ChangeLog
>index 8c2b32c..8a74e09 100644
>--- a/LayoutTests/ChangeLog
>+++ b/LayoutTests/ChangeLog
>@@ -1,3 +1,25 @@
>+2011-05-04  Shishir Agrawal  <shishir@chromium.org>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Implement Page Visibility API.
>+        https://bugs.webkit.org/show_bug.cgi?id=54181
>+
>+        * fast/events/page-visibility-iframe-delete-test-expected.txt: Added.
>+        * fast/events/page-visibility-iframe-delete-test.html: Added.
>+        * fast/events/page-visibility-iframe-move-test-expected.txt: Added.
>+        * fast/events/page-visibility-iframe-move-test.html: Added.
>+        * fast/events/page-visibility-iframe-propagation-test-expected.txt: Added.
>+        * fast/events/page-visibility-iframe-propagation-test.html: Added.
>+        * fast/events/page-visibility-transition-test-expected.txt: Added.
>+        * fast/events/page-visibility-transition-test.html: Added.
>+        * fast/events/resources/page-visibility-iframe-delete-test-frame.html: Added.
>+        * fast/events/resources/page-visibility-iframe-move-new-page.html: Added.
>+        * platform/gtk/Skipped:
>+        * platform/mac/Skipped:
>+        * platform/qt/Skipped:
>+        * platform/win/Skipped:
>+
> 2011-05-03  Jer Noble  <jer.noble@apple.com>
> 
>         Reviewed by Antti Koivisto.
>diff --git a/LayoutTests/fast/events/page-visibility-iframe-delete-test-expected.txt b/LayoutTests/fast/events/page-visibility-iframe-delete-test-expected.txt
>new file mode 100644
>index 0000000..1d20a39
>--- /dev/null
>+++ b/LayoutTests/fast/events/page-visibility-iframe-delete-test-expected.txt
>@@ -0,0 +1,12 @@
>+This test checks that the page visibility event proagation does not crash the browser when frames are added / deleted.
>+
>+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
>+
>+
>+Loaded all frames.
>+Visibility of main document changed.
>+Visibility of sub frame 2 changed.
>+PASS successfullyParsed is true
>+
>+TEST COMPLETE
>+   
>diff --git a/LayoutTests/fast/events/page-visibility-iframe-delete-test.html b/LayoutTests/fast/events/page-visibility-iframe-delete-test.html
>new file mode 100644
>index 0000000..d705f4f
>--- /dev/null
>+++ b/LayoutTests/fast/events/page-visibility-iframe-delete-test.html
>@@ -0,0 +1,110 @@
>+<html>
>+<body onload="startTest()">
>+
>+<p id="description"></p>
>+<div id="console"></div>
>+
>+<script src="../js/resources/js-test-pre.js"></script>
>+
>+<script>
>+
>+description("This test checks that the page visibility event proagation does not crash the browser when frames are added / deleted.");
>+
>+window.jsTestIsAsync = true;
>+window.successfullyParsed = false;
>+
>+var numVisibilityChanges = 0;
>+var frame1, frame2, frame3, frame4, frame5, subframe1, subFrame2, subFrame3;
>+
>+var docsLoaded = 0;
>+var mainPageVisibilityChangeDone = false;
>+var frame2VisiblityChangeDone = false;
>+
>+function startTest() {
>+    ++docsLoaded;
>+    if (docsLoaded < 8) {
>+      return;
>+   }
>+
>+    debug("Loaded all frames.");
>+
>+    frame1 = document.getElementById("topFrame1");
>+    frame2 = document.getElementById("topFrame2");
>+    frame3 = document.getElementById("topFrame3");
>+    frame4 = document.getElementById("topFrame4");
>+    subFrame1 = frame3.contentDocument.getElementById("subIframe1");
>+    subFrame2 = frame3.contentDocument.getElementById("subIframe2");
>+
>+    document.addEventListener(
>+        "webkitvisibilitystatechange", onMainPageVisibilityChange, false);
>+    frame2.contentDocument.addEventListener(
>+        "webkitvisibilitystatechange", onFrame2VisibilityChange, false);
>+    // Change the visibility of the current page to invisible.
>+    if (window.layoutTestController) {
>+        numVisibilityChanges++;
>+        layoutTestController.setPageVisibility("hidden");
>+    }
>+}
>+
>+function finishTest() {
>+    if (window.layoutTestController)
>+        layoutTestController.resetPageVisibility();
>+    window.successfullyParsed = true;
>+    finishJSTest();
>+}
>+
>+function onMainPageVisibilityChange() {
>+    if (mainPageVisibilityChangeDone && frame2VisiblityChangeDone) {
>+        finishTest();
>+    } else if (!mainPageVisibilityChangeDone) {
>+        debug("Visibility of main document changed.");
>+        // Delete frame 4.
>+        document.body.removeChild(frame4);
>+
>+        // Delete subframe 2.
>+        frame3.contentDocument.body.removeChild(subFrame2);
>+
>+        // Add a new frame to top level.
>+        frame5 = document.createElement("iframe");
>+        frame5.src = '';
>+        document.body.appendChild(frame5);
>+
>+        // Add a new frame to frame2.
>+        subFrame3 = frame2.contentDocument.createElement("iframe");
>+        subFrame3.src = '';
>+        frame2.contentDocument.body.appendChild(subFrame3);
>+
>+        mainPageVisibilityChangeDone = true;
>+    }
>+
>+    if (mainPageVisibilityChangeDone && frame2VisiblityChangeDone) {
>+        finishTest();
>+    }
>+}
>+
>+function onFrame2VisibilityChange() {
>+    if (mainPageVisibilityChangeDone && frame2VisiblityChangeDone) {
>+        finishTest();
>+    } else if (!frame2VisiblityChangeDone) {
>+        debug("Visibility of sub frame 2 changed.");
>+
>+        // Delete frame 1.
>+        document.body.removeChild(frame1);
>+
>+        frame2VisiblityChangeDone = true;
>+    }
>+
>+    if (mainPageVisibilityChangeDone && frame2VisiblityChangeDone) {
>+        finishTest();
>+    }
>+}
>+</script>
>+
>+<script src="../js/resources/js-test-post.js"></script>
>+
>+<iframe id="topFrame1" onload="startTest()" ></iframe>
>+<iframe id="topFrame2" onload="startTest()" ></iframe>
>+<iframe id="topFrame3" onload="startTest()" src="resources/page-visibility-iframe-delete-test-frame.html"></iframe>
>+<iframe id="topFrame4" onload="startTest()" ></iframe>
>+</body>
>+</html>
>diff --git a/LayoutTests/fast/events/page-visibility-iframe-move-test-expected.txt b/LayoutTests/fast/events/page-visibility-iframe-move-test-expected.txt
>new file mode 100644
>index 0000000..79440cf
>--- /dev/null
>+++ b/LayoutTests/fast/events/page-visibility-iframe-move-test-expected.txt
>@@ -0,0 +1,21 @@
>+This test checks that an iframe that moves between pages with different visibility will have the correct visibility value.
>+
>+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
>+
>+
>+Window 1 Loaded
>+Window 2 Loaded
>+PASS window.document.webkitIsVisible is true
>+PASS window2.document.webkitIsVisible is true
>+PASS iframe.contentDocument.webkitIsVisible is true
>+PASS window.document.webkitIsVisible is false
>+PASS window2.document.webkitIsVisible is true
>+PASS iframe.contentDocument.webkitIsVisible is true
>+Adopted iframe to Window 1
>+PASS window.document.webkitIsVisible is false
>+PASS window2.document.webkitIsVisible is true
>+PASS iframe.contentDocument.webkitIsVisible is false
>+PASS successfullyParsed is true
>+
>+TEST COMPLETE
>+
>diff --git a/LayoutTests/fast/events/page-visibility-iframe-move-test.html b/LayoutTests/fast/events/page-visibility-iframe-move-test.html
>new file mode 100644
>index 0000000..5abea87
>--- /dev/null
>+++ b/LayoutTests/fast/events/page-visibility-iframe-move-test.html
>@@ -0,0 +1,80 @@
>+<html>
>+<body onload="startTest()">
>+
>+<p id="description"></p>
>+<div id="console"></div>
>+
>+<script src="../js/resources/js-test-pre.js"></script>
>+
>+<script>
>+
>+description("This test checks that an iframe that moves between pages with different visibility will have the correct visibility value.");
>+
>+window.jsTestIsAsync = true;
>+window.successfullyParsed = false;
>+
>+var window2, iframe;
>+var numVisibilityChanges = 0;
>+
>+function window2Loaded() {
>+    debug("Window 2 Loaded");
>+
>+    iframe = window2.document.getElementById("iframe");
>+
>+    shouldBeTrue("window.document.webkitIsVisible");
>+    shouldBeTrue("window2.document.webkitIsVisible");
>+    shouldBeTrue("iframe.contentDocument.webkitIsVisible");
>+
>+    // Change the visibility of the current page to invisible.
>+    if (window.layoutTestController) {
>+        numVisibilityChanges++;
>+        window.layoutTestController.setPageVisibility("hidden");
>+    }
>+}
>+
>+function onVisibilityChange() {
>+    shouldBeFalse("window.document.webkitIsVisible");
>+    shouldBeTrue("window2.document.webkitIsVisible");
>+    shouldBeTrue("iframe.contentDocument.webkitIsVisible");
>+
>+    window.document.adoptNode(iframe);
>+    window.document.body.appendChild(iframe);
>+    debug("Adopted iframe to Window 1");
>+
>+    shouldBeFalse("window.document.webkitIsVisible");
>+    shouldBeTrue("window2.document.webkitIsVisible");
>+    shouldBeFalse("iframe.contentDocument.webkitIsVisible");
>+
>+    window2.close();
>+
>+    window.successfullyParsed = true;
>+    finishTest();
>+}
>+
>+function startTest() {
>+    if (window.layoutTestController) {
>+        layoutTestController.waitUntilDone();
>+        layoutTestController.setCanOpenWindows();
>+    }
>+
>+    debug("Window 1 Loaded");
>+    document.addEventListener("webkitvisibilitystatechange",
>+                              onVisibilityChange, false);
>+
>+    window2 = window.open("resources/page-visibility-iframe-move-new-page.html");
>+    window2.addEventListener("load", window2Loaded, false);
>+}
>+
>+function finishTest() {
>+    if (window.layoutTestController) {
>+        layoutTestController.resetPageVisibility();
>+    }
>+    finishJSTest();
>+}
>+
>+</script>
>+
>+<script src="../js/resources/js-test-post.js"></script>
>+
>+</body>
>+</html>
>diff --git a/LayoutTests/fast/events/page-visibility-iframe-propagation-test-expected.txt b/LayoutTests/fast/events/page-visibility-iframe-propagation-test-expected.txt
>new file mode 100644
>index 0000000..95b79ba
>--- /dev/null
>+++ b/LayoutTests/fast/events/page-visibility-iframe-propagation-test-expected.txt
>@@ -0,0 +1,27 @@
>+This test checks that Page Visibility state events are propagated to child frames.
>+
>+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
>+
>+
>+Main Page:
>+PASS document.webkitVisibilityState is "visible"
>+PASS document.webkitIsVisible is true
>+Child Frame:
>+PASS childFrame.contentDocument.webkitVisibilityState is "visible"
>+PASS childFrame.contentDocument.webkitIsVisible is true
>+Main Page:
>+PASS document.webkitVisibilityState is "hidden"
>+PASS document.webkitIsVisible is false
>+Child Frame:
>+PASS childFrame.contentDocument.webkitVisibilityState is "hidden"
>+PASS childFrame.contentDocument.webkitIsVisible is false
>+Main Page:
>+PASS document.webkitVisibilityState is "visible"
>+PASS document.webkitIsVisible is true
>+Child Frame:
>+PASS childFrame.contentDocument.webkitVisibilityState is "visible"
>+PASS childFrame.contentDocument.webkitIsVisible is true
>+PASS successfullyParsed is true
>+
>+TEST COMPLETE
>+
>diff --git a/LayoutTests/fast/events/page-visibility-iframe-propagation-test.html b/LayoutTests/fast/events/page-visibility-iframe-propagation-test.html
>new file mode 100644
>index 0000000..2a8c5d0
>--- /dev/null
>+++ b/LayoutTests/fast/events/page-visibility-iframe-propagation-test.html
>@@ -0,0 +1,124 @@
>+<html>
>+<body>
>+
>+<p id="description"></p>
>+<div id="console"></div>
>+
>+<script src="../js/resources/js-test-pre.js"></script>
>+
>+<script>
>+
>+description("This test checks that Page Visibility state events are propagated to child frames.");
>+
>+window.jsTestIsAsync = true;
>+window.successfullyParsed = false;
>+
>+function makePageVisible() {
>+    if (window.layoutTestController)
>+        layoutTestController.setPageVisibility("visible");
>+}
>+
>+function makePageHidden() {
>+    if (window.layoutTestController)
>+        layoutTestController.setPageVisibility("hidden");
>+}
>+
>+function checkIsPageVisible() {
>+    debug("Main Page:");
>+    shouldBeEqualToString("document.webkitVisibilityState", "visible");
>+    shouldBeTrue("document.webkitIsVisible");
>+}
>+
>+function checkIsPageHidden() {
>+    debug("Main Page:");
>+    shouldBeEqualToString("document.webkitVisibilityState", "hidden");
>+    shouldBeFalse("document.webkitIsVisible");
>+}
>+
>+function checkIsChildFrameVisible() {
>+    debug("Child Frame:");
>+    shouldBeEqualToString("childFrame.contentDocument.webkitVisibilityState",
>+                          "visible");
>+    shouldBeTrue("childFrame.contentDocument.webkitIsVisible");
>+}
>+
>+function checkIsChildFrameHidden() {
>+    debug("Child Frame:");
>+    shouldBeEqualToString("childFrame.contentDocument.webkitVisibilityState",
>+                          "hidden");
>+    shouldBeFalse("childFrame.contentDocument.webkitIsVisible");
>+}
>+
>+// We will try to change the visibility states as:
>+//  0 - visible. (Initial - i.e. on load).
>+//  1 - hidden
>+//  2 - visible
>+var numVisibilityChanges = 0;
>+
>+var childFrame;
>+
>+function startTest() {
>+    childFrame = document.getElementById("childFrame");
>+    childFrame.contentDocument.addEventListener(
>+        "webkitvisibilitystatechange", onChildFrameVisibilityChange, false);
>+    document.addEventListener("webkitvisibilitystatechange",
>+                              onVisibilityChange, false);
>+
>+    checkIsPageVisible();
>+    checkIsChildFrameVisible();
>+
>+    numVisibilityChanges++;
>+    makePageHidden();
>+}
>+
>+var numFinishes = 0;
>+function finishTest() {
>+    numFinishes++;
>+    if (numFinishes < 2) {
>+      return;
>+    }
>+
>+    if (window.layoutTestController) {
>+        layoutTestController.resetPageVisibility();
>+    }
>+    finishJSTest();
>+}
>+
>+function onVisibilityChange() {
>+    if (numVisibilityChanges == 1) {
>+        checkIsPageHidden();
>+        return;
>+    } else if (numVisibilityChanges == 2) {
>+        checkIsPageVisible();
>+        window.successfullyParsed = true;
>+        finishTest();
>+        return;
>+    } else {
>+        testFailed("Too many visibility transitions");
>+        finishTest();
>+        return;
>+    }
>+}
>+
>+function onChildFrameVisibilityChange() {
>+    if (numVisibilityChanges == 1) {
>+        checkIsChildFrameHidden();
>+        numVisibilityChanges++;
>+        makePageVisible();
>+        return;
>+    } else if (numVisibilityChanges == 2) {
>+        checkIsChildFrameVisible();
>+        finishTest();
>+        return;
>+    } else {
>+        testFailed("Child Frame: Too many visibility transitions");
>+        finishTest();
>+    }
>+}
>+</script>
>+
>+<script src="../js/resources/js-test-post.js"></script>
>+
>+<iframe id="childFrame" onload="startTest()"></iframe>
>+</body>
>+</html>
>diff --git a/LayoutTests/fast/events/page-visibility-transition-test-expected.txt b/LayoutTests/fast/events/page-visibility-transition-test-expected.txt
>new file mode 100644
>index 0000000..25a9b5e
>--- /dev/null
>+++ b/LayoutTests/fast/events/page-visibility-transition-test-expected.txt
>@@ -0,0 +1,17 @@
>+This test checks that Page Visibility state values are correct and the event changes are fired correctly.
>+
>+On success, you will see a series of "PASS" messages, followed by "TEST COMPLETE".
>+
>+
>+PASS document.webkitVisibilityState is "visible"
>+PASS document.webkitIsVisible is true
>+PASS document.webkitVisibilityState is "hidden"
>+PASS document.webkitIsVisible is false
>+PASS document.webkitVisibilityState is "hidden"
>+PASS document.webkitIsVisible is false
>+PASS document.webkitVisibilityState is "visible"
>+PASS document.webkitIsVisible is true
>+PASS successfullyParsed is true
>+
>+TEST COMPLETE
>+
>diff --git a/LayoutTests/fast/events/page-visibility-transition-test.html b/LayoutTests/fast/events/page-visibility-transition-test.html
>new file mode 100644
>index 0000000..814508e
>--- /dev/null
>+++ b/LayoutTests/fast/events/page-visibility-transition-test.html
>@@ -0,0 +1,88 @@
>+<html>
>+<body onload='startTest()'>
>+
>+<p id="description"></p>
>+<div id="console"></div>
>+
>+<script src="../js/resources/js-test-pre.js"></script>
>+
>+<script>
>+
>+description("This test checks that Page Visibility state values are correct and the event changes are fired correctly.");
>+
>+window.jsTestIsAsync = true;
>+window.successfullyParsed = false;
>+
>+function makePageVisible() {
>+    if (window.layoutTestController)
>+        layoutTestController.setPageVisibility("visible");
>+}
>+
>+function makePageHidden() {
>+    if (window.layoutTestController)
>+        layoutTestController.setPageVisibility("hidden");
>+}
>+
>+function checkIsPageVisible() {
>+    shouldBeEqualToString("document.webkitVisibilityState", "visible");
>+    shouldBeTrue("document.webkitIsVisible");
>+}
>+
>+function checkIsPageHidden() {
>+    shouldBeEqualToString("document.webkitVisibilityState", "hidden");
>+    shouldBeFalse("document.webkitIsVisible");
>+}
>+
>+// We will try to change the visibility states as:
>+//  0 - visible. (Initial - i.e. on load).
>+//  1 - hidden (should fire event).
>+//  2 - hidden (no event).
>+//  3 - visible (should fire event).
>+var numVisibilityChanges = 0;
>+
>+function startTest() {
>+    document.addEventListener(
>+        "webkitvisibilitystatechange", onVisibilityChange, false);
>+    checkIsPageVisible();
>+    numVisibilityChanges++;
>+    makePageHidden();
>+}
>+
>+function finishTest() {
>+    if (window.layoutTestController) {
>+        layoutTestController.resetPageVisibility();
>+    }
>+    finishJSTest();
>+}
>+
>+function onVisibilityChange() {
>+    if (numVisibilityChanges == 1) {
>+        checkIsPageHidden();
>+        numVisibilityChanges++;
>+        makePageHidden();
>+        checkIsPageHidden();
>+        numVisibilityChanges++;
>+        makePageVisible();
>+        return;
>+    } else if (numVisibilityChanges == 2) {
>+        testFailed("Invalid event fired on same state change.");
>+        finishTest();
>+        return;
>+    } else if (numVisibilityChanges == 3) {
>+        checkIsPageVisible();
>+        numVisibilityChanges++;
>+        window.successfullyParsed = true;
>+        finishTest();
>+        return;
>+    } else {
>+        testFailed("Too many visibility transitions");
>+        finishTest();
>+        return;
>+    }
>+}
>+</script>
>+
>+<script src="../js/resources/js-test-post.js"></script>
>+
>+</body>
>+</html>
>diff --git a/LayoutTests/fast/events/resources/page-visibility-iframe-delete-test-frame.html b/LayoutTests/fast/events/resources/page-visibility-iframe-delete-test-frame.html
>new file mode 100644
>index 0000000..febb954
>--- /dev/null
>+++ b/LayoutTests/fast/events/resources/page-visibility-iframe-delete-test-frame.html
>@@ -0,0 +1,6 @@
>+<html>
>+<body onload="parent.startTest()">
>+<iframe id="subIframe1" onload="parent.parent.startTest()"></iframe>
>+<iframe id="subIframe2" onload="parent.parent.startTest()"></iframe>
>+</body>
>+</html>
>diff --git a/LayoutTests/fast/events/resources/page-visibility-iframe-move-new-page.html b/LayoutTests/fast/events/resources/page-visibility-iframe-move-new-page.html
>new file mode 100644
>index 0000000..6d28ccc
>--- /dev/null
>+++ b/LayoutTests/fast/events/resources/page-visibility-iframe-move-new-page.html
>@@ -0,0 +1,5 @@
>+<html>
>+<body>
>+<iframe id="iframe"></iframe>
>+</body>
>+</html>
>diff --git a/LayoutTests/platform/gtk/Skipped b/LayoutTests/platform/gtk/Skipped
>index aa21a74..683b540 100644
>--- a/LayoutTests/platform/gtk/Skipped
>+++ b/LayoutTests/platform/gtk/Skipped
>@@ -1412,3 +1412,7 @@ tables/mozilla_expected_failures/bugs/bug85016.html
> # HTTP 204 (No Content) should be ignored
> # https://bugs.webkit.org/show_bug.cgi?id=60206
> http/tests/navigation/response204.html
>+
>+# This platform does not support the Page Visibility API.
>+fast/events/page-visibility-iframe-test.html
>+fast/events/page-visibility-transition-test.html
>diff --git a/LayoutTests/platform/mac/Skipped b/LayoutTests/platform/mac/Skipped
>index 4f4c217..3686cb4 100644
>--- a/LayoutTests/platform/mac/Skipped
>+++ b/LayoutTests/platform/mac/Skipped
>@@ -351,3 +351,7 @@ animations/animation-api-1.html
> # HTTP 204 (No Content) should be ignored
> # https://bugs.webkit.org/show_bug.cgi?id=60206
> http/tests/navigation/response204.html
>+
>+# This platform does not support the Page Visibility API.
>+fast/events/page-visibility-iframe-test.html
>+fast/events/page-visibility-transition-test.html
>diff --git a/LayoutTests/platform/qt/Skipped b/LayoutTests/platform/qt/Skipped
>index e5d2c27..7c10ed2 100644
>--- a/LayoutTests/platform/qt/Skipped
>+++ b/LayoutTests/platform/qt/Skipped
>@@ -2696,3 +2696,7 @@ http/tests/security/contentSecurityPolicy/media-src-blocked.html
> 
> # Animation API is disabled by default
> animations/animation-api-1.html
>+
>+# This platform does not support the Page Visibility API.
>+fast/events/page-visibility-iframe-test.html
>+fast/events/page-visibility-transition-test.html
>diff --git a/LayoutTests/platform/win/Skipped b/LayoutTests/platform/win/Skipped
>index 9076f0a..ec5e104 100644
>--- a/LayoutTests/platform/win/Skipped
>+++ b/LayoutTests/platform/win/Skipped
>@@ -1282,3 +1282,7 @@ animations/animation-api-1.html
> # HTTP 204 (No Content) should be ignored
> # https://bugs.webkit.org/show_bug.cgi?id=60206
> http/tests/navigation/response204.html
>+
>+# This platform does not support the Page Visibility API.
>+fast/events/page-visibility-iframe-test.html
>+fast/events/page-visibility-transition-test.html
>diff --git a/Source/WebCore/CMakeLists.txt b/Source/WebCore/CMakeLists.txt
>index d1afd65..92d09b9 100644
>--- a/Source/WebCore/CMakeLists.txt
>+++ b/Source/WebCore/CMakeLists.txt
>@@ -1011,6 +1011,7 @@ SET(WebCore_SOURCES
>     page/PageGroup.cpp
>     page/PageGroupLoadDeferrer.cpp
>     page/PageSerializer.cpp
>+    page/PageVisibilityState.cpp
>     page/Performance.cpp
>     page/PerformanceNavigation.cpp
>     page/PerformanceTiming.cpp
>diff --git a/Source/WebCore/ChangeLog b/Source/WebCore/ChangeLog
>index ebc6e64..f146e73 100644
>--- a/Source/WebCore/ChangeLog
>+++ b/Source/WebCore/ChangeLog
>@@ -1,3 +1,41 @@
>+2011-05-04  Shishir Agrawal  <shishir@chromium.org>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Implement Page Visibility API.
>+        https://bugs.webkit.org/show_bug.cgi?id=54181
>+
>+        Tests: fast/events/page-visibility-iframe-delete-test.html
>+               fast/events/page-visibility-iframe-move-test.html
>+               fast/events/page-visibility-iframe-propagation-test.html
>+               fast/events/page-visibility-transition-test.html
>+
>+        * CMakeLists.txt:
>+        * GNUmakefile.list.am:
>+        * WebCore.gypi:
>+        * WebCore.pro:
>+        * WebCore.vcproj/WebCore.vcproj:
>+        * WebCore.xcodeproj/project.pbxproj:
>+        * dom/Document.cpp:
>+        (WebCore::Document::visibilityState):
>+        (WebCore::Document::webkitVisibilityState):
>+        (WebCore::Document::webkitIsVisible):
>+        (WebCore::Document::dispatchVisibilityStateChangeEvent):
>+        * dom/Document.h:
>+        * dom/Document.idl:
>+        * dom/EventNames.h:
>+        * page/Frame.cpp:
>+        (WebCore::Frame::dispatchVisibilityStateChangeEvent):
>+        * page/Frame.h:
>+        * page/Page.cpp:
>+        (WebCore::Page::Page):
>+        (WebCore::Page::setVisibilityState):
>+        (WebCore::Page::visibilityState):
>+        * page/Page.h:
>+        * page/PageVisibilityState.cpp: Added.
>+        (WebCore::GetPageVisibilityStateString):
>+        * page/PageVisibilityState.h: Added.
>+
> 2011-05-03  Jer Noble  <jer.noble@apple.com>
> 
>         Reviewed by Antti Koivisto.
>diff --git a/Source/WebCore/GNUmakefile.list.am b/Source/WebCore/GNUmakefile.list.am
>index 825de4d..92ea113 100644
>--- a/Source/WebCore/GNUmakefile.list.am
>+++ b/Source/WebCore/GNUmakefile.list.am
>@@ -2220,6 +2220,8 @@ webcore_sources += \
> 	Source/WebCore/page/PageGroupLoadDeferrer.h \
> 	Source/WebCore/page/PageSerializer.cpp \
> 	Source/WebCore/page/PageSerializer.h \
>+	Source/WebCore/page/PageVisibilityState.cpp \
>+	Source/WebCore/page/PageVisibilityState.h \
> 	Source/WebCore/page/Performance.cpp \
> 	Source/WebCore/page/Performance.h \
> 	Source/WebCore/page/PerformanceNavigation.cpp \
>diff --git a/Source/WebCore/WebCore.gypi b/Source/WebCore/WebCore.gypi
>index bb4a3fa..fe7a01e 100644
>--- a/Source/WebCore/WebCore.gypi
>+++ b/Source/WebCore/WebCore.gypi
>@@ -711,6 +711,7 @@
>             'page/Page.h',
>             'page/PageGroup.h',
>             'page/PageSerializer.h',
>+            'page/PageVisibilityState.h',
>             'page/PluginHalterClient.h',
>             'page/PositionCallback.h',
>             'page/PositionError.h',
>@@ -3434,6 +3435,7 @@
>             'page/PageGroupLoadDeferrer.cpp',
>             'page/PageGroupLoadDeferrer.h',
>             'page/PageSerializer.cpp',
>+            'page/PageVisibilityState.cpp',
>             'page/Performance.cpp',
>             'page/Performance.h',
>             'page/PerformanceNavigation.cpp',
>diff --git a/Source/WebCore/WebCore.pro b/Source/WebCore/WebCore.pro
>index f0babbc..87f51f6 100644
>--- a/Source/WebCore/WebCore.pro
>+++ b/Source/WebCore/WebCore.pro
>@@ -921,6 +921,7 @@ SOURCES += \
>     page/PageGroup.cpp \
>     page/PageGroupLoadDeferrer.cpp \
>     page/PageSerializer.cpp \
>+    page/PageVisibilityState.cpp \
>     page/Performance.cpp \
>     page/PerformanceNavigation.cpp \
>     page/PerformanceTiming.cpp \
>@@ -1861,6 +1862,7 @@ HEADERS += \
>     page/PageGroupLoadDeferrer.h \
>     page/Page.h \
>     page/PageSerializer.h \
>+    page/PageVisibilityState.h \
>     page/PluginHalter.h \
>     page/PluginHalterClient.h \
>     page/PrintContext.h \
>diff --git a/Source/WebCore/WebCore.vcproj/WebCore.vcproj b/Source/WebCore/WebCore.vcproj/WebCore.vcproj
>index 72ed781..45ca3ef 100755
>--- a/Source/WebCore/WebCore.vcproj/WebCore.vcproj
>+++ b/Source/WebCore/WebCore.vcproj/WebCore.vcproj
>@@ -24750,6 +24750,12 @@
> 				>
> 			</File>
> 			<File
>+				RelativePath="..\page\PageVisibilityState.cpp"
>+				>
>+			<File
>+				RelativePath="..\page\PageVisibilityState.h"
>+				>
>+			<File
> 				RelativePath="..\page\Performance.cpp"
> 				>
> 			</File>
>diff --git a/Source/WebCore/WebCore.xcodeproj/project.pbxproj b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>index a73a354..5334306 100644
>--- a/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>+++ b/Source/WebCore/WebCore.xcodeproj/project.pbxproj
>@@ -5924,6 +5924,8 @@
> 		FE80DA660E9C4703000D6F75 /* JSGeoposition.h in Headers */ = {isa = PBXBuildFile; fileRef = FE80DA620E9C4703000D6F75 /* JSGeoposition.h */; };
> 		FE80DA710E9C472F000D6F75 /* JSPositionError.cpp in Sources */ = {isa = PBXBuildFile; fileRef = FE80DA6D0E9C472F000D6F75 /* JSPositionError.cpp */; };
> 		FE80DA720E9C472F000D6F75 /* JSPositionError.h in Headers */ = {isa = PBXBuildFile; fileRef = FE80DA6E0E9C472F000D6F75 /* JSPositionError.h */; };
>+		FFD5B97A135CC97800D5E92A /* PageVisibilityState.cpp in Sources */ = {isa = PBXBuildFile; fileRef = FFD5B977135CC97800D5E92A /* PageVisibilityState.cpp */; };
>+		FFD5B97B135CC97800D5E92A /* PageVisibilityState.h in Headers */ = {isa = PBXBuildFile; fileRef = FFD5B978135CC97800D5E92A /* PageVisibilityState.h */; settings = {ATTRIBUTES = (Private, ); }; };
> /* End PBXBuildFile section */
> 
> /* Begin PBXContainerItemProxy section */
>@@ -12443,6 +12445,8 @@
> 		FE80DA620E9C4703000D6F75 /* JSGeoposition.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JSGeoposition.h; sourceTree = "<group>"; };
> 		FE80DA6D0E9C472F000D6F75 /* JSPositionError.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = JSPositionError.cpp; sourceTree = "<group>"; };
> 		FE80DA6E0E9C472F000D6F75 /* JSPositionError.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = JSPositionError.h; sourceTree = "<group>"; };
>+		FFD5B977135CC97800D5E92A /* PageVisibilityState.cpp */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.cpp.cpp; path = PageVisibilityState.cpp; sourceTree = "<group>"; };
>+		FFD5B978135CC97800D5E92A /* PageVisibilityState.h */ = {isa = PBXFileReference; fileEncoding = 4; lastKnownFileType = sourcecode.c.h; path = PageVisibilityState.h; sourceTree = "<group>"; };
> /* End PBXFileReference section */
> 
> /* Begin PBXFrameworksBuildPhase section */
>@@ -14168,6 +14172,8 @@
> 				7A674BDA0F9EBF4E006CF099 /* PageGroupLoadDeferrer.h */,
> 				371E65CD13661EED00BEEDB0 /* PageSerializer.cpp */,
> 				371E65CB13661EDC00BEEDB0 /* PageSerializer.h */,
>+				FFD5B977135CC97800D5E92A /* PageVisibilityState.cpp */,
>+				FFD5B978135CC97800D5E92A /* PageVisibilityState.h */,
> 				8A844D0111D3C18E0014065C /* Performance.cpp */,
> 				8A844D0211D3C18E0014065C /* Performance.h */,
> 				8A844D0311D3C18E0014065C /* Performance.idl */,
>@@ -21869,6 +21875,7 @@
> 				F34742E51343633C00531BC2 /* PageScriptDebugServer.h in Headers */,
> 				371E65CC13661EDC00BEEDB0 /* PageSerializer.h in Headers */,
> 				E1284AE110447D4500EAEB52 /* PageTransitionEvent.h in Headers */,
>+				FFD5B97B135CC97800D5E92A /* PageVisibilityState.h in Headers */,
> 				51E1ECC30C91C90400DC255B /* PageURLRecord.h in Headers */,
> 				0885067F11DA045B00182B98 /* PaintInfo.h in Headers */,
> 				0885068011DA045B00182B98 /* PaintPhase.h in Headers */,
>@@ -24734,6 +24741,7 @@
> 				371E65CE13661EED00BEEDB0 /* PageSerializer.cpp in Sources */,
> 				E1284AEA10447DEE00EAEB52 /* PageTransitionEvent.cpp in Sources */,
> 				51E1ECC20C91C90400DC255B /* PageURLRecord.cpp in Sources */,
>+				FFD5B97A135CC97800D5E92A /* PageVisibilityState.cpp in Sources */,
> 				FD3160A212B026F700C1A359 /* Panner.cpp in Sources */,
> 				F55B3DC91251F12D003EF269 /* PasswordInputType.cpp in Sources */,
> 				4B2709830AF2E5E00065127F /* PasteboardMac.mm in Sources */,
>diff --git a/Source/WebCore/dom/Document.cpp b/Source/WebCore/dom/Document.cpp
>index 5bcea73..34bcdfd 100644
>--- a/Source/WebCore/dom/Document.cpp
>+++ b/Source/WebCore/dom/Document.cpp
>@@ -1354,6 +1354,34 @@ void Document::removeTitle(Element* titleElement)
>         updateTitle(StringWithDirection());
> }
> 
>+#if ENABLE(PAGE_VISIBILITY_API)
>+PageVisibilityState Document::visibilityState() const
>+{
>+    // The visibility of the document is inherited from the visibility of the
>+    // page. If there is no page associated with the document, we will assume
>+    // that the page is visible i.e. invisibility has to be explicitly
>+    // specified by the embedder.
>+    if (!m_frame || !m_frame->page())
>+        return PageVisibilityStateVisible;
>+    return m_frame->page()->visibilityState();
>+}
>+
>+String Document::webkitVisibilityState() const
>+{
>+    return GetPageVisibilityStateString(visibilityState());
>+}
>+
>+bool Document::webkitIsVisible() const
>+{
>+    return visibilityState() == PageVisibilityStateVisible;
>+}
>+
>+void Document::dispatchVisibilityStateChangeEvent()
>+{
>+    dispatchEvent(Event::create(eventNames().webkitvisibilitystatechangeEvent, false, false));
>+}
>+#endif
>+
> String Document::nodeName() const
> {
>     return "#document";
>diff --git a/Source/WebCore/dom/Document.h b/Source/WebCore/dom/Document.h
>index 2315e79..71b7af7 100644
>--- a/Source/WebCore/dom/Document.h
>+++ b/Source/WebCore/dom/Document.h
>@@ -34,6 +34,7 @@
> #include "DOMTimeStamp.h"
> #include "DocumentTiming.h"
> #include "IconURL.h"
>+#include "PageVisibilityState.h"
> #include "QualifiedName.h"
> #include "ScriptExecutionContext.h"
> #include "StringWithDirection.h"
>@@ -304,6 +305,9 @@ public:
> #if ENABLE(FULLSCREEN_API)
>     DEFINE_ATTRIBUTE_EVENT_LISTENER(webkitfullscreenchange);
> #endif
>+#if ENABLE(PAGE_VISIBILITY_API)
>+    DEFINE_ATTRIBUTE_EVENT_LISTENER(webkitvisibilitystatechange);
>+#endif
> 
>     ViewportArguments viewportArguments() const { return m_viewportArguments; }
> 
>@@ -379,6 +383,12 @@ public:
> 
>     virtual KURL baseURI() const;
> 
>+#if ENABLE(PAGE_VISIBILITY_API)
>+    String webkitVisibilityState() const;
>+    bool webkitIsVisible() const;
>+    void dispatchVisibilityStateChangeEvent();
>+#endif
>+
>     PassRefPtr<Node> adoptNode(PassRefPtr<Node> source, ExceptionCode&);
> 
>     PassRefPtr<HTMLCollection> images();
>@@ -1132,6 +1142,10 @@ private:
> 
>     void loadEventDelayTimerFired(Timer<Document>*);
> 
>+#if ENABLE(PAGE_VISIBILITY_API)
>+    PageVisibilityState visibilityState() const;
>+#endif
>+
>     int m_guardRefCount;
> 
>     OwnPtr<CSSStyleSelector> m_styleSelector;
>diff --git a/Source/WebCore/dom/Document.idl b/Source/WebCore/dom/Document.idl
>index 5cfab24..89ae65e 100644
>--- a/Source/WebCore/dom/Document.idl
>+++ b/Source/WebCore/dom/Document.idl
>@@ -334,6 +334,10 @@ module core {
>         boolean isHTMLDocument();
> #endif
> 
>+        // Page visibility API.
>+        readonly attribute [Conditional=PAGE_VISIBILITY_API] DOMString webkitVisibilityState;
>+        readonly attribute [Conditional=PAGE_VISIBILITY_API] boolean webkitIsVisible;
>+
>     };
> 
> }
>diff --git a/Source/WebCore/dom/EventNames.h b/Source/WebCore/dom/EventNames.h
>index ece2a08..96f0383 100644
>--- a/Source/WebCore/dom/EventNames.h
>+++ b/Source/WebCore/dom/EventNames.h
>@@ -106,6 +106,7 @@ namespace WebCore {
>     macro(unload) \
>     macro(updateready) \
>     macro(versionchange) \
>+    macro(webkitvisibilitystatechange) \
>     macro(write) \
>     macro(writeend) \
>     macro(writestart) \
>diff --git a/Source/WebCore/page/Frame.cpp b/Source/WebCore/page/Frame.cpp
>index e835948..4824647 100644
>--- a/Source/WebCore/page/Frame.cpp
>+++ b/Source/WebCore/page/Frame.cpp
>@@ -718,6 +718,16 @@ void Frame::setDOMWindow(DOMWindow* domWindow)
>     m_domWindow = domWindow;
> }
> 
>+#if ENABLE(PAGE_VISIBILITY_API)
>+void Frame::dispatchVisibilityStateChangeEvent()
>+{
>+    if (m_doc)
>+        m_doc->dispatchVisibilityStateChangeEvent();
>+    for (Frame* child = tree()->firstChild(); child; child = child->tree()->nextSibling())
>+        child->dispatchVisibilityStateChangeEvent();
>+}
>+#endif
>+
> DOMWindow* Frame::domWindow() const
> {
>     if (!m_domWindow)
>diff --git a/Source/WebCore/page/Frame.h b/Source/WebCore/page/Frame.h
>index 2d76aee..8693253 100644
>--- a/Source/WebCore/page/Frame.h
>+++ b/Source/WebCore/page/Frame.h
>@@ -119,6 +119,10 @@ namespace WebCore {
> 
>         void transferChildFrameToNewDocument();
> 
>+#if ENABLE(PAGE_VISIBILITY_API)
>+        void dispatchVisibilityStateChangeEvent();
>+#endif
>+
>     // ======== All public functions below this point are candidates to move out of Frame into another class. ========
> 
>         bool isDisconnected() const;
>diff --git a/Source/WebCore/page/Page.cpp b/Source/WebCore/page/Page.cpp
>index 76642f8..4b88a8a 100644
>--- a/Source/WebCore/page/Page.cpp
>+++ b/Source/WebCore/page/Page.cpp
>@@ -163,6 +163,9 @@ Page::Page(const PageClients& pageClients)
>     , m_viewMode(ViewModeWindowed)
>     , m_minimumTimerInterval(Settings::defaultMinDOMTimerInterval())
>     , m_isEditable(false)
>+#if ENABLE(PAGE_VISIBILITY_API)
>+    , m_visibilityState(PageVisibilityStateVisible)
>+#endif
> {
>     if (!allPages) {
>         allPages = new HashSet<Page*>;
>@@ -934,6 +937,23 @@ void Page::checkFrameCountConsistency() const
> }
> #endif
> 
>+#if ENABLE(PAGE_VISIBILITY_API)
>+void Page::setVisibilityState(PageVisibilityState visibilityState, bool isInitialState)
>+{
>+    if (m_visibilityState == visibilityState)
>+        return;
>+    m_visibilityState = visibilityState;
>+
>+    if (!isInitialState && m_mainFrame)
>+        m_mainFrame->dispatchVisibilityStateChangeEvent();
>+}
>+
>+PageVisibilityState Page::visibilityState() const
>+{
>+    return m_visibilityState;
>+}
>+#endif
>+
> Page::PageClients::PageClients()
>     : chromeClient(0)
>     , contextMenuClient(0)
>diff --git a/Source/WebCore/page/Page.h b/Source/WebCore/page/Page.h
>index 60193fb..ea3f1d5 100644
>--- a/Source/WebCore/page/Page.h
>+++ b/Source/WebCore/page/Page.h
>@@ -23,6 +23,7 @@
> 
> #include "FrameLoaderTypes.h"
> #include "FindOptions.h"
>+#include "PageVisibilityState.h"
> #include "PlatformString.h"
> #include "ViewportArguments.h"
> #include <wtf/Forward.h>
>@@ -300,6 +301,11 @@ namespace WebCore {
>         void setEditable(bool isEditable) { m_isEditable = isEditable; }
>         bool isEditable() { return m_isEditable; }
> 
>+#if ENABLE(PAGE_VISIBILITY_API)
>+        PageVisibilityState visibilityState() const;
>+        void setVisibilityState(PageVisibilityState, bool);
>+#endif
>+
>     private:
>         void initGroup();
> 
>@@ -405,6 +411,10 @@ namespace WebCore {
>         OwnPtr<ScrollableAreaSet> m_scrollableAreaSet;
> 
>         bool m_isEditable;
>+
>+#if ENABLE(PAGE_VISIBILITY_API)
>+        PageVisibilityState m_visibilityState;
>+#endif
>     };
> 
> } // namespace WebCore
>diff --git a/Source/WebCore/page/PageVisibilityState.cpp b/Source/WebCore/page/PageVisibilityState.cpp
>new file mode 100644
>index 0000000..fe18dfa
>--- /dev/null
>+++ b/Source/WebCore/page/PageVisibilityState.cpp
>@@ -0,0 +1,56 @@
>+/*
>+ * Copyright (C) 2011 Google 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:
>+ *
>+ *     * Redistributions of source code must retain the above copyright
>+ * notice, this list of conditions and the following disclaimer.
>+ *     * 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.
>+ *     * Neither the name of Google Inc. nor the names of its
>+ * contributors may be used to endorse or promote products derived from
>+ * this software without specific prior written permission.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
>+ * OWNER OR 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.
>+ */
>+
>+#include "config.h"
>+#include "PageVisibilityState.h"
>+
>+#if ENABLE(PAGE_VISIBILITY_API)
>+
>+namespace WebCore {
>+
>+String GetPageVisibilityStateString(PageVisibilityState state)
>+{
>+    DEFINE_STATIC_LOCAL(const String, visible, ("visible"));
>+    DEFINE_STATIC_LOCAL(const String, hidden, ("hidden"));
>+
>+    switch (state) {
>+    case PageVisibilityStateVisible:
>+        return visible;
>+    case PageVisibilityStateHidden:
>+        return hidden;
>+    }
>+
>+    ASSERT_NOT_REACHED();
>+    return String();
>+}
>+
>+} // namespace WebCore
>+
>+#endif // if ENABLE(PAGE_VISIBILITY_API)
>diff --git a/Source/WebCore/page/PageVisibilityState.h b/Source/WebCore/page/PageVisibilityState.h
>new file mode 100644
>index 0000000..a7d7021
>--- /dev/null
>+++ b/Source/WebCore/page/PageVisibilityState.h
>@@ -0,0 +1,51 @@
>+/*
>+ * Copyright (C) 2011 Google 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:
>+ *
>+ *     * Redistributions of source code must retain the above copyright
>+ * notice, this list of conditions and the following disclaimer.
>+ *     * 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.
>+ *     * Neither the name of Google Inc. nor the names of its
>+ * contributors may be used to endorse or promote products derived from
>+ * this software without specific prior written permission.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
>+ * OWNER OR 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.
>+ */
>+
>+#ifndef PageVisibilityState_h
>+#define PageVisibilityState_h
>+
>+#include <wtf/text/WTFString.h>
>+
>+namespace WebCore {
>+
>+// The enum is not flag protected as it is used in the WebKit chromium API
>+// without flag protection.
>+enum PageVisibilityState {
>+    PageVisibilityStateVisible,
>+    PageVisibilityStateHidden
>+};
>+
>+#if ENABLE(PAGE_VISIBILITY_API)
>+String GetPageVisibilityStateString(PageVisibilityState);
>+#endif
>+
>+} // namespace WebCore
>+
>+#endif // ifndef PageVisibilityState_h
>diff --git a/Source/WebKit/chromium/ChangeLog b/Source/WebKit/chromium/ChangeLog
>index 3ca088d..51a5a73 100644
>--- a/Source/WebKit/chromium/ChangeLog
>+++ b/Source/WebKit/chromium/ChangeLog
>@@ -1,3 +1,22 @@
>+2011-05-04  Shishir Agrawal  <shishir@chromium.org>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Implement Page Visibility API.
>+        https://bugs.webkit.org/show_bug.cgi?id=54181
>+
>+        * WebKit.gyp:
>+        * features.gypi:
>+        * public/WebPageVisibilityState.h: Added.
>+        * public/WebView.h:
>+        (WebKit::WebView::setVisibilityState):
>+        * public/WebViewClient.h:
>+        (WebKit::WebViewClient::visibilityState):
>+        * src/WebViewImpl.cpp:
>+        (WebKit::WebViewImpl::WebViewImpl):
>+        (WebKit::WebViewImpl::setVisibilityState):
>+        * src/WebViewImpl.h:
>+
> 2011-05-04  Nate Chapin  <japhet@chromium.org>
> 
>         Reviewed by Mihai Parparita.
>diff --git a/Source/WebKit/chromium/WebKit.gyp b/Source/WebKit/chromium/WebKit.gyp
>index 3e0b0d9..a6e9b27 100644
>--- a/Source/WebKit/chromium/WebKit.gyp
>+++ b/Source/WebKit/chromium/WebKit.gyp
>@@ -227,6 +227,7 @@
>                 'public/WebOptionElement.h',
>                 'public/WebPageSerializer.h',
>                 'public/WebPageSerializerClient.h',
>+                'public/WebPageVisibilityState.h',
>                 'public/WebPasswordAutocompleteListener.h',
>                 'public/WebPasswordFormData.h',
>                 'public/WebPerformance.h',
>diff --git a/Source/WebKit/chromium/features.gypi b/Source/WebKit/chromium/features.gypi
>index 510fbe6..1448f9b 100644
>--- a/Source/WebKit/chromium/features.gypi
>+++ b/Source/WebKit/chromium/features.gypi
>@@ -75,7 +75,7 @@
>         'ENABLE_OFFLINE_WEB_APPLICATIONS=1',
>         'ENABLE_OPENTYPE_SANITIZER=1',
>         'ENABLE_ORIENTATION_EVENTS=0',
>-        'ENABLE_PAGE_VISIBILITY_API=0',
>+        'ENABLE_PAGE_VISIBILITY_API=1',
>         'ENABLE_PROGRESS_TAG=1',
>         'ENABLE_QUOTA=1',
>         'ENABLE_REGISTER_PROTOCOL_HANDLER=0',
>diff --git a/Source/WebKit/chromium/public/WebPageVisibilityState.h b/Source/WebKit/chromium/public/WebPageVisibilityState.h
>new file mode 100644
>index 0000000..5474be4
>--- /dev/null
>+++ b/Source/WebKit/chromium/public/WebPageVisibilityState.h
>@@ -0,0 +1,45 @@
>+/*
>+ * Copyright (C) 2011 Google 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:
>+ *
>+ *     * Redistributions of source code must retain the above copyright
>+ * notice, this list of conditions and the following disclaimer.
>+ *     * 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.
>+ *     * Neither the name of Google Inc. nor the names of its
>+ * contributors may be used to endorse or promote products derived from
>+ * this software without specific prior written permission.
>+ *
>+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
>+ * OWNER OR 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.
>+ */
>+
>+#ifndef WebPageVisibilityState_h
>+#define WebPageVisibilityState_h
>+
>+namespace WebKit {
>+
>+// The following enum should be consistent with the PageVisibilityState enum
>+// defined in WebCore.
>+enum WebPageVisibilityState {
>+    WebPageVisibilityStateVisible,
>+    WebPageVisibilityStateHidden
>+};
>+
>+} // namespace WebKit
>+
>+#endif
>diff --git a/Source/WebKit/chromium/public/WebView.h b/Source/WebKit/chromium/public/WebView.h
>index 3e9b3d6..4a3ab58 100644
>--- a/Source/WebKit/chromium/public/WebView.h
>+++ b/Source/WebKit/chromium/public/WebView.h
>@@ -32,6 +32,7 @@
> #define WebView_h
> 
> #include "WebDragOperation.h"
>+#include "WebPageVisibilityState.h"
> #include "WebString.h"
> #include "WebVector.h"
> #include "WebWidget.h"
>@@ -357,6 +358,12 @@ public:
>     // APIs.
>     virtual WebGraphicsContext3D* graphicsContext3D() = 0;
> 
>+    // Visibility -----------------------------------------------------------
>+
>+    // Sets the visibility of the WebView.
>+    virtual void setVisibilityState(WebPageVisibilityState visibilityState,
>+                                    bool isInitialState) { }
>+
> protected:
>     ~WebView() {}
> };
>diff --git a/Source/WebKit/chromium/public/WebViewClient.h b/Source/WebKit/chromium/public/WebViewClient.h
>index 5174351..f3be3ca 100644
>--- a/Source/WebKit/chromium/public/WebViewClient.h
>+++ b/Source/WebKit/chromium/public/WebViewClient.h
>@@ -36,6 +36,7 @@
> #include "WebEditingAction.h"
> #include "WebFileChooserCompletion.h"
> #include "WebFileChooserParams.h"
>+#include "WebPageVisibilityState.h"
> #include "WebPopupType.h"
> #include "WebString.h"
> #include "WebTextAffinity.h"
>@@ -315,6 +316,14 @@ public:
>                                          const WebString& url,
>                                          const WebString& title) { }
> 
>+    // Visibility -----------------------------------------------------------
>+
>+    // Returns the current visibility of the WebView.
>+    virtual WebPageVisibilityState visibilityState() const
>+    {
>+        return WebPageVisibilityStateVisible;
>+    }
>+
> protected:
>     ~WebViewClient() { }
> };
>diff --git a/Source/WebKit/chromium/src/WebViewImpl.cpp b/Source/WebKit/chromium/src/WebViewImpl.cpp
>index cb02466..abbf72e 100644
>--- a/Source/WebKit/chromium/src/WebViewImpl.cpp
>+++ b/Source/WebKit/chromium/src/WebViewImpl.cpp
>@@ -366,6 +366,10 @@ WebViewImpl::WebViewImpl(WebViewClient* client)
> 
>     m_page->setGroupName(pageGroupName);
> 
>+#if ENABLE(PAGE_VISIBILITY_API)
>+    setVisibilityState(m_client->visibilityState(), true);
>+#endif
>+
>     m_inspectorSettingsMap = adoptPtr(new SettingsMap);
> }
> 
>@@ -2560,4 +2564,24 @@ WebGraphicsContext3D* WebViewImpl::graphicsContext3D()
>     return 0;
> }
> 
>+
>+void WebViewImpl::setVisibilityState(WebPageVisibilityState visibilityState,
>+                                     bool isInitialState) {
>+#if ENABLE(PAGE_VISIBILITY_API)
>+    if (!page())
>+        return;
>+
>+    switch (visibilityState) {
>+    case WebPageVisibilityStateVisible:
>+        m_page->setVisibilityState(PageVisibilityStateVisible, isInitialState);
>+        return;
>+    case WebPageVisibilityStateHidden:
>+        m_page->setVisibilityState(PageVisibilityStateHidden, isInitialState);
>+        return;
>+    default:
>+        ASSERT_NOT_REACHED();
>+    }
>+#endif
>+}
>+
> } // namespace WebKit
>diff --git a/Source/WebKit/chromium/src/WebViewImpl.h b/Source/WebKit/chromium/src/WebViewImpl.h
>index d8d92a8..f290827 100644
>--- a/Source/WebKit/chromium/src/WebViewImpl.h
>+++ b/Source/WebKit/chromium/src/WebViewImpl.h
>@@ -355,6 +355,8 @@ public:
>     // WebGL. Returns 0 if compositing support is not compiled in.
>     virtual WebGraphicsContext3D* graphicsContext3D();
> 
>+    virtual void setVisibilityState(WebPageVisibilityState, bool);
>+
>     WebCore::PopupContainer* selectPopup() const { return m_selectPopup.get(); }
> 
>     // Returns true if the event leads to scrolling.
>diff --git a/Tools/ChangeLog b/Tools/ChangeLog
>index 7f40e16..89a3b91 100644
>--- a/Tools/ChangeLog
>+++ b/Tools/ChangeLog
>@@ -1,3 +1,23 @@
>+2011-05-04  Shishir Agrawal  <shishir@chromium.org>
>+
>+        Reviewed by NOBODY (OOPS!).
>+
>+        Implement Page Visibility API.
>+        https://bugs.webkit.org/show_bug.cgi?id=54181
>+
>+        * DumpRenderTree/LayoutTestController.cpp:
>+        (setPageVisibilityCallback):
>+        (resetPageVisibilityCallback):
>+        (LayoutTestController::staticFunctions):
>+        * DumpRenderTree/LayoutTestController.h:
>+        (LayoutTestController::setPageVisibility):
>+        (LayoutTestController::resetPageVisibility):
>+        * DumpRenderTree/chromium/LayoutTestController.cpp:
>+        (LayoutTestController::LayoutTestController):
>+        (LayoutTestController::resetPageVisibility):
>+        (LayoutTestController::setPageVisibility):
>+        * DumpRenderTree/chromium/LayoutTestController.h:
>+
> 2011-05-04  Siddharth Mathur  <siddharth.mathur@nokia.com>
> 
>         Reviewed by Laszlo Gombos.
>diff --git a/Tools/DumpRenderTree/LayoutTestController.cpp b/Tools/DumpRenderTree/LayoutTestController.cpp
>index 4ca90d8..42fe81d 100644
>--- a/Tools/DumpRenderTree/LayoutTestController.cpp
>+++ b/Tools/DumpRenderTree/LayoutTestController.cpp
>@@ -1670,6 +1670,37 @@ static JSValueRef setPluginsEnabledCallback(JSContextRef context, JSObjectRef fu
>     return JSValueMakeUndefined(context);
> }    
> 
>+static JSValueRef setPageVisibilityCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
>+{
>+    // Has mac & windows implementation
>+    if (argumentCount < 1)
>+        return JSValueMakeUndefined(context);
>+
>+    JSRetainPtr<JSStringRef> visibility(Adopt, JSValueToStringCopy(context, arguments[0], exception));
>+    ASSERT(!*exception);
>+
>+    size_t maxLength = JSStringGetMaximumUTF8CStringSize(visibility.get());
>+    char* visibilityBuffer = new char[maxLength + 1];
>+    JSStringGetUTF8CString(visibility.get(), visibilityBuffer, maxLength + 1);
>+    
>+    LayoutTestController* controller = static_cast<LayoutTestController*>(JSObjectGetPrivate(thisObject));
>+    controller->setPageVisibility(visibilityBuffer);
>+    delete[] visibilityBuffer;
>+    
>+    return JSValueMakeUndefined(context);
>+}    
>+
>+static JSValueRef resetPageVisibilityCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
>+{
>+    // Has mac & windows implementation
>+    if (argumentCount < 1)
>+        return JSValueMakeUndefined(context);
>+
>+    LayoutTestController* controller = static_cast<LayoutTestController*>(JSObjectGetPrivate(thisObject));
>+    controller->resetPageVisibility();
>+    return JSValueMakeUndefined(context);
>+}    
>+
> static JSValueRef setSmartInsertDeleteEnabledCallback(JSContextRef context, JSObjectRef function, JSObjectRef thisObject, size_t argumentCount, const JSValueRef arguments[], JSValueRef* exception)
> {
>     if (argumentCount < 1)
>@@ -2256,6 +2287,7 @@ JSStaticFunction* LayoutTestController::staticFunctions()
>         { "removeAllVisitedLinks", removeAllVisitedLinksCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>         { "removeOriginAccessWhitelistEntry", removeOriginAccessWhitelistEntryCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>         { "repaintSweepHorizontally", repaintSweepHorizontallyCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>+        { "resetPageVisibility", resetPageVisibilityCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>         { "setAcceptsEditing", setAcceptsEditingCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>         { "setAllowUniversalAccessFromFileURLs", setAllowUniversalAccessFromFileURLsCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>         { "setAllowFileAccessFromFileURLs", setAllowFileAccessFromFileURLsCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>@@ -2288,6 +2320,7 @@ JSStaticFunction* LayoutTestController::staticFunctions()
>         { "setMockGeolocationPosition", setMockGeolocationPositionCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>         { "addMockSpeechInputResult", addMockSpeechInputResultCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>         { "setNewWindowsCopyBackForwardList", setNewWindowsCopyBackForwardListCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>+        { "setPageVisibility", setPageVisibilityCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>         { "setPOSIXLocale", setPOSIXLocaleCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>         { "setPersistentUserStyleSheetLocation", setPersistentUserStyleSheetLocationCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>         { "setPopupBlockingEnabled", setPopupBlockingEnabledCallback, kJSPropertyAttributeReadOnly | kJSPropertyAttributeDontDelete },
>diff --git a/Tools/DumpRenderTree/LayoutTestController.h b/Tools/DumpRenderTree/LayoutTestController.h
>index a31e908..d4e3775 100644
>--- a/Tools/DumpRenderTree/LayoutTestController.h
>+++ b/Tools/DumpRenderTree/LayoutTestController.h
>@@ -123,6 +123,9 @@ public:
>     void setScrollbarPolicy(JSStringRef orientation, JSStringRef policy);
>     void setEditingBehavior(const char* editingBehavior);
> 
>+    void setPageVisibility(const char* visibility) { }
>+    void resetPageVisibility() { }
>+
>     JSValueRef shadowRoot(JSContextRef, JSValueRef);
>     JSValueRef ensureShadowRoot(JSContextRef, JSValueRef);
>     void removeShadowRoot(JSContextRef, JSValueRef);
>diff --git a/Tools/DumpRenderTree/chromium/LayoutTestController.cpp b/Tools/DumpRenderTree/chromium/LayoutTestController.cpp
>index ee8d5ac..62698c1 100644
>--- a/Tools/DumpRenderTree/chromium/LayoutTestController.cpp
>+++ b/Tools/DumpRenderTree/chromium/LayoutTestController.cpp
>@@ -134,6 +134,7 @@ LayoutTestController::LayoutTestController(TestShell* shell)
>     bindMethod("removeOriginAccessWhitelistEntry", &LayoutTestController::removeOriginAccessWhitelistEntry);
>     bindMethod("removeShadowRoot", &LayoutTestController::removeShadowRoot);
>     bindMethod("repaintSweepHorizontally", &LayoutTestController::repaintSweepHorizontally);
>+    bindMethod("resetPageVisibility", &LayoutTestController::resetPageVisibility);
>     bindMethod("resumeAnimations", &LayoutTestController::resumeAnimations);
>     bindMethod("sampleSVGAnimationForElementAtTime", &LayoutTestController::sampleSVGAnimationForElementAtTime);
>     bindMethod("setAcceptsEditing", &LayoutTestController::setAcceptsEditing);
>@@ -157,6 +158,7 @@ LayoutTestController::LayoutTestController(TestShell* shell)
>     bindMethod("setMockGeolocationError", &LayoutTestController::setMockGeolocationError);
>     bindMethod("setMockGeolocationPosition", &LayoutTestController::setMockGeolocationPosition);
>     bindMethod("addMockSpeechInputResult", &LayoutTestController::addMockSpeechInputResult);
>+    bindMethod("setPageVisibility", &LayoutTestController::setPageVisibility);
>     bindMethod("setPluginsEnabled", &LayoutTestController::setPluginsEnabled);
>     bindMethod("setPopupBlockingEnabled", &LayoutTestController::setPopupBlockingEnabled);
>     bindMethod("setPOSIXLocale", &LayoutTestController::setPOSIXLocale);
>@@ -1766,3 +1768,19 @@ void LayoutTestController::setPluginsEnabled(const CppArgumentList& arguments, C
>     }
>     result->setNull();
> }
>+
>+void LayoutTestController::resetPageVisibility(const CppArgumentList& arguments, CppVariant* result)
>+{
>+    m_shell->webView()->setVisibilityState(WebPageVisibilityStateVisible, true);
>+}
>+
>+void LayoutTestController::setPageVisibility(const CppArgumentList& arguments, CppVariant* result)
>+{
>+    if (arguments.size() > 0 && arguments[0].isString()) {
>+        string newVisibility = arguments[0].toString();
>+        if (newVisibility == "visible")
>+            m_shell->webView()->setVisibilityState(WebPageVisibilityStateVisible, false);
>+        else if (newVisibility == "hidden")
>+            m_shell->webView()->setVisibilityState(WebPageVisibilityStateHidden, false);
>+    }
>+}
>diff --git a/Tools/DumpRenderTree/chromium/LayoutTestController.h b/Tools/DumpRenderTree/chromium/LayoutTestController.h
>index 44ac2cd..1071acd 100644
>--- a/Tools/DumpRenderTree/chromium/LayoutTestController.h
>+++ b/Tools/DumpRenderTree/chromium/LayoutTestController.h
>@@ -365,6 +365,10 @@ public:
>     // Enable or disable plugins.
>     void setPluginsEnabled(const CppArgumentList&, CppVariant*);
> 
>+    // Switch the visibility of the page.
>+    void setPageVisibility(const CppArgumentList&, CppVariant*);
>+    void resetPageVisibility(const CppArgumentList&, CppVariant*);
>+
> public:
>     // The following methods are not exposed to JavaScript.
>     void setWorkQueueFrozen(bool frozen) { m_workQueue.setFrozen(frozen); }

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Attachments on bug 54181: 82102 | 82295 | 84908 | 89874 | 90455 | 91388 | 92357 | 92449 | 92502 | 92523 | 92746