cc : Add OnOpacityAnimated to effect tree

cc/trees/property_tree.h

 // Copyright 2014 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_TREES_PROPERTY_TREE_H_
 #define CC_TREES_PROPERTY_TREE_H_
 
 #include <stddef.h>
 
 #include <memory>
@@ skipping 313 matching lines @@
   bool operator==(const EffectTree& other) const;
 
   static const int kContentsRootNodeId = 1;
 
   void clear();
 
   float EffectiveOpacity(const EffectNode* node) const;
 
   void UpdateSurfaceContentsScale(EffectNode* node);
 
+  void OnOpacityAnimated(float opacity, int id, LayerTreeImpl* layer_tree_impl);
+
   void UpdateEffects(int id);
 
   void UpdateEffectChanged(EffectNode* node, EffectNode* parent_node);
 
   void AddCopyRequest(int node_id, std::unique_ptr<CopyOutputRequest> request);
   void PushCopyRequestsTo(EffectTree* other_tree);
   void TakeCopyRequestsAndTransformToSurface(
       int node_id,
       std::vector<std::unique_ptr<CopyOutputRequest>>* requests);
   bool HasCopyRequests() const;
@@ skipping 269 matching lines @@
   gfx::Vector2dF inner_viewport_container_bounds_delta_;
   gfx::Vector2dF outer_viewport_container_bounds_delta_;
   gfx::Vector2dF inner_viewport_scroll_bounds_delta_;
 
   PropertyTreesCachedData cached_data_;
 };
 
 }  // namespace cc
 
 #endif  // CC_TREES_PROPERTY_TREE_H_