CC Animation: Introduce some dirty flags to optimize PushProperties on commit

cc/animation/animation_player.h

Index: cc/animation/animation_player.h
diff --git a/cc/animation/animation_player.h b/cc/animation/animation_player.h
index 5c4c58e94db4c7fdf3ed8f220b668a02b29b8fe7..1afdbfb522a8d2ed1353a1eaa78151544e9f1364 100644
--- a/cc/animation/animation_player.h
+++ b/cc/animation/animation_player.h
@@ -82,6 +82,7 @@ class CC_EXPORT AnimationPlayer : public base::RefCounted<AnimationPlayer> {
   void NotifyAnimationAborted(base::TimeTicks monotonic_time,
                               TargetProperty::Type target_property,
                               int group);
+  void NotifyAnimationWaitingForDeletion();
   void NotifyAnimationTakeover(base::TimeTicks monotonic_time,
                                TargetProperty::Type target_property,
                                double animation_start_time,
@@ -92,6 +93,9 @@ class CC_EXPORT AnimationPlayer : public base::RefCounted<AnimationPlayer> {
     return !animations_.empty();
   }
 
+  bool needs_push_properties() const { return needs_push_properties_; }
+  void SetNeedsPushProperties();
+
  private:
   friend class base::RefCounted<AnimationPlayer>;
 
@@ -119,6 +123,7 @@ class CC_EXPORT AnimationPlayer : public base::RefCounted<AnimationPlayer> {
 
   int id_;
   ElementId element_id_;
+  bool needs_push_properties_;
 
   DISALLOW_COPY_AND_ASSIGN(AnimationPlayer);
 };