CC Animation: Use std::bitset to update animation state.

cc/layers/layer_impl.h

 // Copyright 2011 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef CC_LAYERS_LAYER_IMPL_H_
 #define CC_LAYERS_LAYER_IMPL_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 75 matching lines @@
   static std::unique_ptr<LayerImpl> Create(LayerTreeImpl* tree_impl, int id) {
     return base::WrapUnique(new LayerImpl(tree_impl, id));
   }
 
   virtual ~LayerImpl();
 
   int id() const { return layer_id_; }
 
   // Interactions with attached animations.
   gfx::ScrollOffset ScrollOffsetForAnimation() const;
-  void OnTransformIsCurrentlyAnimatingChanged(bool is_currently_animating);
-  void OnTransformIsPotentiallyAnimatingChanged(bool has_potential_animation);
-  void OnOpacityIsCurrentlyAnimatingChanged(bool is_currently_animating);
-  void OnOpacityIsPotentiallyAnimatingChanged(bool has_potential_animation);
-  void OnFilterIsCurrentlyAnimatingChanged(bool is_currently_animating);
-  void OnFilterIsPotentiallyAnimatingChanged(bool has_potential_animation);
+  void OnIsAnimatingChanged(const PropertyAnimationState& mask,
+                            const PropertyAnimationState& state);
   bool IsActive() const;
 
   void DistributeScroll(ScrollState* scroll_state);
   void ApplyScroll(ScrollState* scroll_state);
 
   void set_property_tree_sequence_number(int sequence_number) {}
 
   void SetTransformTreeIndex(int index);
   int transform_tree_index() const { return transform_tree_index_; }
 
@@ skipping 460 matching lines @@
   bool scrolls_drawn_descendant_ : 1;
   bool has_will_change_transform_hint_ : 1;
   bool needs_push_properties_ : 1;
 
   DISALLOW_COPY_AND_ASSIGN(LayerImpl);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_IMPL_H_