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

chrome/browser/chromeos/status/power_menu_button.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_STATUS_POWER_MENU_BUTTON_H_
 #define CHROME_BROWSER_CHROMEOS_STATUS_POWER_MENU_BUTTON_H_
 #pragma once
 
 #include "chrome/browser/chromeos/dbus/power_manager_client.h"
 #include "chrome/browser/chromeos/status/status_area_button.h"
 #include "views/controls/menu/menu_delegate.h"
 #include "views/controls/menu/view_menu_delegate.h"
 
 namespace base {
 class TimeDelta;
 }
 
 namespace views {
 class MenuRunner;
 }
 
-class SkBitmap;
-
 namespace chromeos {
 
 class StatusAreaBubbleContentView;
 
 // The power menu button in the status area.
 // This class will handle getting the power status and populating the menu.
 class PowerMenuButton : public StatusAreaButton,
                         public views::MenuDelegate,
                         public views::ViewMenuDelegate,
                         public PowerManagerClient::Observer {
@@ skipping 47 matching lines @@
 
   // If non-null the menu is showing.
   scoped_ptr<views::MenuRunner> menu_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(PowerMenuButton);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_STATUS_POWER_MENU_BUTTON_H_