Refactors animation to allow for cleaner subclassing. I'm doing this

chrome/browser/chromeos/panels/panel_scroller.h

-// Copyright (c) 2009 The Chromium Authors. All rights reserved.  Use of this
+// Copyright (c) 2010 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 CHROME_BROWSER_CHROMEOS_PANELS_PANEL_SCROLLER_H_
 #define CHROME_BROWSER_CHROMEOS_PANELS_PANEL_SCROLLER_H_
 
 #include <vector>
 
 #include "app/slide_animation.h"
 #include "base/basictypes.h"
@@ skipping 19 matching lines @@
   virtual void OnMouseReleased(const views::MouseEvent& event, bool canceled);
 
   // Called when a panel header is clicked with the affected container. This
   // function will make sure the panel is fully visible.
   void HeaderClicked(PanelScrollerHeader* source);
 
  private:
   struct Panel;
 
   // AnimationDelegate overrides.
-  virtual void AnimationEnded(const Animation* animation);
   virtual void AnimationProgressed(const Animation* animation);
-  virtual void AnimationCanceled(const Animation* animation);
 
   // Scrolls to the panel at the given index. It will be moved to the top.
   void ScrollToPanel(int index);
 
   // All panels in this scroller.
   std::vector<Panel*> panels_;
 
   // Height in pixels of the headers above each panel.
   int divider_height_;
 
   bool needs_layout_;
 
   // The current scroll position.
   int scroll_pos_;
 
   SlideAnimation animation_;
 
   // When animating a scroll, these indicate the beginning and ending of the
   // scroll. The scroll_pos_ always indicates the current one.
   int animated_scroll_begin_;
   int animated_scroll_end_;
 
   DISALLOW_COPY_AND_ASSIGN(PanelScroller);
 };
 
 #endif  // CHROME_BROWSER_CHROMEOS_PANELS_PANEL_SCROLLER_H_