Move ui/gfx/animation/ into its own component.

ui/gfx/animation/animation_container_observer.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_ANIMATION_ANIMATION_CONTAINER_OBSERVER_H_
 #define UI_GFX_ANIMATION_ANIMATION_CONTAINER_OBSERVER_H_
 
-#include "ui/gfx/gfx_export.h"
+#include "ui/gfx/animation/animation_export.h"
 
 namespace gfx {
 
 class AnimationContainer;
 
 // The observer is notified after every update of the animations managed by
 // the container.
-class GFX_EXPORT AnimationContainerObserver {
+class ANIMATION_EXPORT AnimationContainerObserver {
  public:
   // Invoked on every tick of the timer managed by the container and after
   // all the animations have updated.
   virtual void AnimationContainerProgressed(
       AnimationContainer* container) = 0;
 
   // Invoked when no more animations are being managed by this container.
   virtual void AnimationContainerEmpty(AnimationContainer* container) = 0;
 
  protected:
   virtual ~AnimationContainerObserver() {}
 };
 
 }  // namespace gfx
 
 #endif  // UI_GFX_ANIMATION_ANIMATION_CONTAINER_OBSERVER_H_