Animation: Cancel same-property animations on compositor

Source/core/animation/CompositorAnimations.h

Index: Source/core/animation/CompositorAnimations.h
diff --git a/Source/core/animation/CompositorAnimations.h b/Source/core/animation/CompositorAnimations.h
index 0f6add9e19807f9dfd4d1f7d00afd0d07671099a..47abf0809a6d7fa0bbe8f353ae18cb03b5191736 100644
--- a/Source/core/animation/CompositorAnimations.h
+++ b/Source/core/animation/CompositorAnimations.h
@@ -38,6 +38,7 @@
 
 namespace blink {
 
+class AnimationPlayer;
 class Element;
 class FloatBox;
 
@@ -46,10 +47,11 @@ public:
     static CompositorAnimations* instance() { return instance(0); }
     static void setInstanceForTesting(CompositorAnimations* newInstance) { instance(newInstance); }
 
-    virtual bool isCandidateForAnimationOnCompositor(const Timing&, const AnimationEffect&, double playerPlaybackRate);
+    virtual bool isCandidateForAnimationOnCompositor(const Timing&, const Element*, const AnimationPlayer*, const AnimationEffect&, double playerPlaybackRate);
+    virtual void cancelAffectedAnimationsOnCompositor(const Element&, const AnimationPlayer&, const AnimationEffect&);
     virtual bool canStartAnimationOnCompositor(const Element&);
     // FIXME: This should return void. We should know ahead of time whether these animations can be started.
-    virtual bool startAnimationOnCompositor(const Element&, int group, double startTime, double timeOffset, const Timing&, const AnimationEffect&, Vector<int>& startedAnimationIds, double playerPlaybackRate);
+    virtual bool startAnimationOnCompositor(const Element&, int group, double startTime, double timeOffset, const Timing&, const AnimationPlayer*, const AnimationEffect&, Vector<int>& startedAnimationIds, double playerPlaybackRate);
     virtual void cancelAnimationOnCompositor(const Element&, int id);
     virtual void pauseAnimationForTestingOnCompositor(const Element&, int id, double pauseTime);