Merge 102405 - Source/WebCore: Improve handling of frame removal during requestAnimationFrame cal...

Merge 102405 - Source/WebCore: Improve handling of frame removal during requestAnimationFrame callback invocation
https://bugs.webkit.org/show_bug.cgi?id=74036

Reviewed by Adam Barth.

See bug for details.

Test: fast/animation/request-animation-frame-detach-element.html

* dom/Document.cpp:
(WebCore::Document::removedLastRef):
(WebCore::Document::detach):
* dom/Document.h:
* dom/ScriptedAnimationController.cpp:
(WebCore::ScriptedAnimationController::~ScriptedAnimationController):
(WebCore::ScriptedAnimationController::serviceScriptedAnimations):
(WebCore::ScriptedAnimationController::scheduleAnimation):
* dom/ScriptedAnimationController.h:
(WebCore::ScriptedAnimationController::create):
(WebCore::ScriptedAnimationController::clearDocumentPointer):
* page/FrameView.cpp:
(WebCore::FrameView::serviceScriptedAnimations):

LayoutTests: Add some tests for removing frames from the document while servicing requestAnimationFrame callbacks
https://bugs.webkit.org/show_bug.cgi?id=74036

Reviewed by Adam Barth.

* fast/animation/request-animation-frame-detach-element-expected.txt: Added.
* fast/animation/request-animation-frame-detach-element.html: Added.

BUG=106672
TBR=jamesr@google.com
Committed: http://src.chromium.org/viewvc/chrome?view=rev&revision=102463