Bug 278785 – REGRESSION(281966@main): [Win] `PageClient::didPerformDragOperation()` is never called

• Component: New Bugs
• Status: RESOLVED FIXED

[Vitaly Dyackhov]

Before 281966@main

```
void WebPageProxy::performDragOperation(DragData& dragData, const String& dragStorageName, SandboxExtension::Handle&& sandboxExtensionHandle, Vector<SandboxExtension::Handle>&& sandboxExtensionsForUpload)
{
#if PLATFORM(COCOA)
    grantAccessToCurrentPasteboardData(dragStorageName);
#endif

#if PLATFORM(GTK)
    performDragControllerAction(DragControllerAction::PerformDragOperation, dragData);
#else
    if (!hasRunningProcess())
        return;

    sendWithAsyncReply(Messages::WebPage::PerformDragOperation(dragData, WTFMove(sandboxExtensionHandle), WTFMove(sandboxExtensionsForUpload)), [this, protectedThis = Ref { *this }] (bool handled) {
        protectedPageClient()->didPerformDragOperation(handled);
    });
#endif
}
```

after

```
void WebPageProxy::performDragOperation(DragData& dragData, const String& dragStorageName, SandboxExtension::Handle&& sandboxExtensionHandle, Vector<SandboxExtension::Handle>&& sandboxExtensionsForUpload)
{

#if PLATFORM(GTK)
    performDragControllerAction(DragControllerAction::PerformDragOperation, dragData);
#endif
#if PLATFORM(COCOA)
    if (!hasRunningProcess())
        return;
    grantAccessToCurrentPasteboardData(dragStorageName, [this, protectedThis = Ref { *this }, dragStorageName, dragData = WTFMove(dragData), sandboxExtensionHandle = WTFMove(sandboxExtensionHandle), sandboxExtensionsForUpload = WTFMove(sandboxExtensionsForUpload)] () mutable {
        sendWithAsyncReply(Messages::WebPage::PerformDragOperation(dragData, WTFMove(sandboxExtensionHandle), WTFMove(sandboxExtensionsForUpload)), [this, protectedThis = Ref { *this }] (bool handled) {
            protectedPageClient()->didPerformDragOperation(handled);
        });
    });
#endif
}
```

Note missing #else directive.

[Vitaly Dyackhov]

Pull request: https://github.com/WebKit/WebKit/pull/32822

[EWS]

Committed 283050@main (b9af02f5af3f): <https://commits.webkit.org/283050@main>

Reviewed commits have been landed. Closing PR #32822 and removing active labels.

[Radar WebKit Bug Importer]

<rdar://problem/135130132>