chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/toolbar/toolbar_action_view.h

 // Copyright 2013 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_UI_VIEWS_TOOLBAR_TOOLBAR_ACTION_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_ACTION_VIEW_H_
 
 #include "base/callback.h"
 #include "base/macros.h"
 #include "chrome/browser/ui/views/toolbar/toolbar_action_view_delegate_views.h"
 #include "ui/views/context_menu_controller.h"
 #include "ui/views/controls/button/menu_button.h"
 #include "ui/views/controls/button/menu_button_listener.h"
 #include "ui/views/controls/menu/menu_model_adapter.h"
 #include "ui/views/drag_controller.h"
 #include "ui/views/view.h"
 
-class ExtensionAction;
-
-namespace extensions {
-class Extension;
-}
-
-namespace gfx {
-class Image;
-}
-
 namespace views {
 class MenuItemView;
 class MenuModelAdapter;
 class MenuRunner;
 }
 
 ////////////////////////////////////////////////////////////////////////////////
 // ToolbarActionView
 // A wrapper around a ToolbarActionViewController to display a toolbar action
 // action in the BrowserActionsContainer.
@@ skipping 122 matching lines @@
 
   // The time the popup was last closed.
   base::TimeTicks popup_closed_time_;
 
   base::WeakPtrFactory<ToolbarActionView> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(ToolbarActionView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_TOOLBAR_TOOLBAR_ACTION_VIEW_H_