Move animation code to new ui/base/animation directory....

ui/base/animation/animation_delegate.h

-// Copyright (c) 2010 The Chromium Authors. All rights reserved.
+// 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 APP_ANIMATION_DELEGATE_H_
-#define APP_ANIMATION_DELEGATE_H_
+#ifndef UI_BASE_ANIMATION_ANIMATION_DELEGATE_H_
+#define UI_BASE_ANIMATION_ANIMATION_DELEGATE_H_
 #pragma once
 
+namespace ui {
+
 class Animation;
 
 // AnimationDelegate
 //
 //  Implement this interface when you want to receive notifications about the
 //  state of an animation.
 class AnimationDelegate {
  public:
   // Called when an animation has completed.
   virtual void AnimationEnded(const Animation* animation) {}
 
   // Called when an animation has progressed.
   virtual void AnimationProgressed(const Animation* animation) {}
 
   // Called when an animation has been canceled.
   virtual void AnimationCanceled(const Animation* animation) {}
 
  protected:
   virtual ~AnimationDelegate() {}
 };
 
-#endif  // APP_ANIMATION_DELEGATE_H_
+}  // namespace ui
+
+#endif  // UI_BASE_ANIMATION_ANIMATION_DELEGATE_H_