ash: Animate changes in the uber tray.

ash/system/tray/tray_image_item.h

 // Copyright (c) 2012 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 ASH_SYSTEM_TRAY_TRAY_IMAGE_ITEM_H_
 #define ASH_SYSTEM_TRAY_TRAY_IMAGE_ITEM_H_
 #pragma once
 
 #include "ash/system/tray/system_tray_item.h"
 
 namespace views {
 class ImageView;
 }
 
 namespace ash {
 namespace internal {
 
+class TrayItemView;
+
 class TrayImageItem : public SystemTrayItem {
  public:
   explicit TrayImageItem(int resource_id);
   virtual ~TrayImageItem();
 
-  views::ImageView* image_view() { return image_view_.get(); }
+  views::View* tray_view();
 
  protected:
   virtual bool GetInitialVisibility() = 0;
 
   // Overridden from SystemTrayItem.
   virtual views::View* CreateTrayView(user::LoginStatus status) OVERRIDE;
   virtual views::View* CreateDefaultView(user::LoginStatus status) OVERRIDE;
   virtual views::View* CreateDetailedView(user::LoginStatus status) OVERRIDE;
   virtual void DestroyTrayView() OVERRIDE;
   virtual void DestroyDefaultView() OVERRIDE;
   virtual void DestroyDetailedView() OVERRIDE;
 
  private:
   int resource_id_;
-  scoped_ptr<views::ImageView> image_view_;
+  scoped_ptr<TrayItemView> tray_view_;
 
   DISALLOW_COPY_AND_ASSIGN(TrayImageItem);
 };
 
 }  // namespace internal
 }  // namespace ash
 
 #endif  // ASH_SYSTEM_TRAY_TRAY_IMAGE_ITEM_H_