CC Animation: Use ElementId to attach CC animation players.

third_party/WebKit/Source/core/animation/Animation.h

Index: third_party/WebKit/Source/core/animation/Animation.h
diff --git a/third_party/WebKit/Source/core/animation/Animation.h b/third_party/WebKit/Source/core/animation/Animation.h
index d60061dd863e0e6f1b39d32e09d2287c0deadac2..c0e2a2f4105df8a59b96a33ae6c52374251db9d7 100644
--- a/third_party/WebKit/Source/core/animation/Animation.h
+++ b/third_party/WebKit/Source/core/animation/Animation.h
@@ -208,8 +208,8 @@ private:
     void destroyCompositorPlayer();
     void attachCompositorTimeline();
     void detachCompositorTimeline();
-    void attachCompositedLayers();
-    void detachCompositedLayers();
+    void attachCompositorPlayerToElement();
+    void detachCompositorPlayerFromElement();
     // CompositorAnimationDelegate implementation.
     void notifyAnimationStarted(double monotonicTime, int group) override;
     void notifyAnimationFinished(double monotonicTime, int group) override { }