Allows observers to be notified when layer animations complete.

ui/gfx/compositor/layer_delegate.h

 // Copyright (c) 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 UI_GFX_COMPOSITOR_LAYER_DELEGATE_H_
 #define UI_GFX_COMPOSITOR_LAYER_DELEGATE_H_
 #pragma once
 
 #include "ui/gfx/compositor/compositor_export.h"
 
 namespace gfx {
 class Canvas;
 }
 
 namespace ui {
 
-class LayerAnimationSequence;
-
 // A delegate interface implemented by an object that renders to a Layer.
 class COMPOSITOR_EXPORT LayerDelegate {
  public:
   // Paint content for the layer to the specified canvas. It has already been
   // clipped to the Layer's invalid rect.
   virtual void OnPaintLayer(gfx::Canvas* canvas) = 0;
 
-  // Called when |seq| ends.
-  virtual void OnLayerAnimationEnded(const LayerAnimationSequence* seq) = 0;
-
  protected:
   virtual ~LayerDelegate() {}
 };
 
 }  // namespace ui
 
 #endif  // UI_GFX_COMPOSITOR_LAYER_DELEGATE_H_