[DRAFT] Animations: Profile hash look-ups for external mutators

cc/animation/animation_host.h

Index: cc/animation/animation_host.h
diff --git a/cc/animation/animation_host.h b/cc/animation/animation_host.h
index 6e0126c7ae54bbfb25c1df846ee5e7b5d4caad4a..1bb188b3e23fdabb456443eb40dea1dbfeff0b29 100644
--- a/cc/animation/animation_host.h
+++ b/cc/animation/animation_host.h
@@ -65,6 +65,7 @@ class CC_EXPORT AnimationHost {
   void SetLayerTreeMutatorsClient(LayerTreeMutatorsClient* client);
 
   void SetNeedsCommit();
+  void ReportAndClearStatsOnFrameEnd();
 
   void PushPropertiesTo(AnimationHost* host_impl);
 
@@ -148,6 +149,7 @@ class CC_EXPORT AnimationHost {
   AnimationTimelineList timelines_;
   scoped_ptr<AnimationRegistrar> animation_registrar_;
   LayerTreeMutatorsClient* layer_tree_mutators_client_;
+  mutable base::TimeDelta find_player_for_layer_id_stats_;
 
   scoped_ptr<ScrollOffsetAnimations> scroll_offset_animations_;