Allow impl-only animations, and return opacity values via AnimationEvents.

cc/layer_animation_controller.h

 // Copyright 2012 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_LAYER_ANIMATION_CONTROLLER_H_
 #define CC_LAYER_ANIMATION_CONTROLLER_H_
 
 #include "base/basictypes.h"
 #include "base/hash_tables.h"
 #include "base/memory/ref_counted.h"
@@ skipping 31 matching lines @@
     virtual void removeAnimation(int animationId);
     virtual void removeAnimation(int animationId, Animation::TargetProperty);
     virtual void suspendAnimations(double monotonicTime);
     virtual void resumeAnimations(double monotonicTime);
 
     // Ensures that the list of active animations on the main thread and the impl thread
     // are kept in sync. This function does not take ownership of the impl thread controller.
     virtual void pushAnimationUpdatesTo(LayerAnimationController*);
 
     void animate(double monotonicTime);
+    void accumulatePropertyUpdates(double monotonicTime, AnimationEventsVector*);
     void updateState(AnimationEventsVector*);
 
     // Returns the active animation in the given group, animating the given property, if such an
     // animation exists.
     Animation* getAnimation(int groupId, Animation::TargetProperty) const;
 
     // Returns the active animation animating the given property that is either running, or is
     // next to run, if such an animation exists.
     Animation* getAnimation(Animation::TargetProperty) const;
 
@@ skipping 65 matching lines @@
     double m_lastTickTime;
 
     ObserverList<LayerAnimationValueObserver> m_observers;
 
     DISALLOW_COPY_AND_ASSIGN(LayerAnimationController);
 };
 
 } // namespace cc
 
 #endif  // CC_LAYER_ANIMATION_CONTROLLER_H_