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

cc/layers/layer.h

 // Copyright 2010 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_H_
 #define CC_LAYERS_LAYER_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 541 matching lines @@
   friend class LayerTreeHost;
   friend class LayerTree;
   friend class LayerInternalsForTest;
 
   // Interactions with attached animations.
   gfx::ScrollOffset ScrollOffsetForAnimation() const;
   void OnFilterAnimated(const FilterOperations& filters);
   void OnOpacityAnimated(float opacity);
   void OnTransformAnimated(const gfx::Transform& transform);
   void OnScrollOffsetAnimated(const gfx::ScrollOffset& scroll_offset);
-  void OnTransformIsCurrentlyAnimatingChanged(bool is_animating);
-  void OnTransformIsPotentiallyAnimatingChanged(bool is_animating);
-  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 FilterIsAnimating() const;
   bool TransformIsAnimating() const;
   bool ScrollOffsetAnimationWasInterrupted() const;
   bool HasOnlyTranslationTransforms() const;
 
   void AddScrollChild(Layer* child);
   void RemoveScrollChild(Layer* child);
 
   void AddClipChild(Layer* child);
@@ skipping 143 matching lines @@
   // These all act like draw properties, so don't need push properties.
   gfx::Rect visible_layer_rect_;
   size_t num_unclipped_descendants_;
 
   DISALLOW_COPY_AND_ASSIGN(Layer);
 };
 
 }  // namespace cc
 
 #endif  // CC_LAYERS_LAYER_H_