chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/infobars/infobar_view.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 CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_VIEW_H_
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "components/infobars/core/infobar.h"
 #include "components/infobars/core/infobar_container.h"
 #include "third_party/skia/include/core/SkPath.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/controls/button/vector_icon_button_delegate.h"
 #include "ui/views/controls/menu/menu_types.h"
 #include "ui/views/focus/external_focus_tracker.h"
 #include "ui/views/view_targeter_delegate.h"
 
-namespace ui {
-class MenuModel;
-}
-
 namespace views {
 class ImageView;
 class Label;
-class LabelButton;
 class Link;
 class LinkListener;
-class MenuButton;
 class MenuRunner;
 class VectorIconButton;
 }  // namespace views
 
 class InfoBarView : public infobars::InfoBar,
                     public views::View,
                     public views::VectorIconButtonDelegate,
                     public views::ExternalFocusTracker,
                     public views::ViewTargeterDelegate {
  public:
@@ skipping 86 matching lines @@
   // The close button at the right edge of the InfoBar.
   views::VectorIconButton* close_button_;
 
   // Used to run the menu.
   std::unique_ptr<views::MenuRunner> menu_runner_;
 
   DISALLOW_COPY_AND_ASSIGN(InfoBarView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_INFOBARS_INFOBAR_VIEW_H_