Cleanup: Remove unneeded forward declarations from chrome/browser/chromeos.

chrome/browser/chromeos/login/user_view.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 CHROME_BROWSER_CHROMEOS_LOGIN_USER_VIEW_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_USER_VIEW_H_
 #pragma once
 
 #include <string>
 
 #include "views/controls/button/button.h"
 #include "views/controls/link_listener.h"
 #include "views/view.h"
 
 class SkBitmap;
 
 namespace views {
 class ImageView;
 class TextButton;
-class Throbber;
 }  // namespace views
 
 namespace chromeos {
 
 class SignoutView;
 class PodImageView;
 
 class UserView : public views::View,
                  public views::LinkListener,
                  public views::ButtonListener {
@@ skipping 55 matching lines @@
 
   SignoutView* signout_view_;
   bool ignore_signout_click_;
   PodImageView* image_view_;
 
   views::TextButton* remove_button_;
 
   DISALLOW_COPY_AND_ASSIGN(UserView);
 };
 
-}  // chromeos
+}  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_USER_VIEW_H_