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

chrome/browser/chromeos/notifications/balloon_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.
 
 // Draws the view for the balloons.
 
 #ifndef CHROME_BROWSER_CHROMEOS_NOTIFICATIONS_BALLOON_VIEW_H_
 #define CHROME_BROWSER_CHROMEOS_NOTIFICATIONS_BALLOON_VIEW_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/notifications/balloon.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
 #include "ui/gfx/path.h"
 #include "ui/gfx/point.h"
 #include "ui/gfx/rect.h"
 #include "ui/gfx/size.h"
 #include "views/view.h"
 
 namespace views {
-class MenuButton;
-class MouseEvent;
-class TextButton;
 class Widget;
 }  // namespace views
 
 class Notification;
 
 namespace chromeos {
 
 class BalloonViewHost;
 class NotificationControlView;
 
@@ skipping 81 matching lines @@
   bool closed_;
   // True to enable WebUI in the notification.
   bool web_ui_;
 
   DISALLOW_COPY_AND_ASSIGN(BalloonViewImpl);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_NOTIFICATIONS_BALLOON_VIEW_H_