Avoid updating compositor animations in hitTest path

Source/core/layout/compositing/DeprecatedPaintLayerCompositor.cpp

Index: Source/core/layout/compositing/DeprecatedPaintLayerCompositor.cpp
diff --git a/Source/core/layout/compositing/DeprecatedPaintLayerCompositor.cpp b/Source/core/layout/compositing/DeprecatedPaintLayerCompositor.cpp
index 96cbd28a83e364b7906caa15d6adc7ab9b3b3b66..c0d674cd1ecd93fb25092cb3b53e08f20abd564b 100644
--- a/Source/core/layout/compositing/DeprecatedPaintLayerCompositor.cpp
+++ b/Source/core/layout/compositing/DeprecatedPaintLayerCompositor.cpp
@@ -28,7 +28,6 @@
 #include "core/layout/compositing/DeprecatedPaintLayerCompositor.h"
 
 #include "core/animation/AnimationTimeline.h"
-#include "core/animation/DocumentAnimations.h"
 #include "core/dom/DOMNodeIds.h"
 #include "core/dom/Fullscreen.h"
 #include "core/editing/FrameSelection.h"
@@ -232,14 +231,6 @@ void DeprecatedPaintLayerCompositor::updateIfNeededRecursive()
     updateIfNeeded();
     lifecycle().advanceTo(DocumentLifecycle::CompositingClean);
 
-    DocumentAnimations::updateCompositorAnimations(m_layoutView.document());
-
-    m_layoutView.frameView()->scrollableArea()->updateCompositorScrollAnimations();
-    if (const FrameView::ScrollableAreaSet* animatingScrollableAreas = m_layoutView.frameView()->animatingScrollableAreas()) {
-        for (ScrollableArea* scrollableArea : *animatingScrollableAreas)
-            scrollableArea->updateCompositorScrollAnimations();
-    }
-

[qiankun, 2015/07/24 10:57:08]

Move these code out of updateIfNeededRecursive will make subFrame don't update
animation. There are some layout tests failure . I added a new function for hit
test path. The new function is same as updateIfNeededRecursive except no
animation update. What do you think about it?

I tried to make updateCompositorAnimations not a no-op when called twice, but
didn't get a good solution. Feel free to take over the bug, if you have a good
solution.

 #if ENABLE(ASSERT)
     ASSERT(lifecycle().state() == DocumentLifecycle::CompositingClean);
     assertNoUnresolvedDirtyBits();