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

ui/base/animation/animation_container_observer.h

Index: ui/base/animation/animation_container_observer.h
===================================================================
--- ui/base/animation/animation_container_observer.h	(revision 0)
+++ ui/base/animation/animation_container_observer.h	(working copy)
@@ -1,11 +1,13 @@
-// 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_CONTAINER_OBSERVER_H_
-#define APP_ANIMATION_CONTAINER_OBSERVER_H_
+#ifndef UI_BASE_ANIMATION_ANIMATION_CONTAINER_OBSERVER_H_
+#define UI_BASE_ANIMATION_ANIMATION_CONTAINER_OBSERVER_H_
 #pragma once
 
+namespace ui {
+
 class AnimationContainer;
 
 // The observer is notified after every update of the animations managed by
@@ -24,4 +26,6 @@
   virtual ~AnimationContainerObserver() {}
 };
 
-#endif  // APP_ANIMATION_CONTAINER_OBSERVER_H_
+}  // namespace ui
+
+#endif  // UI_BASE_ANIMATION_ANIMATION_CONTAINER_OBSERVER_H_