chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/frame/browser_frame.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_FRAME_BROWSER_FRAME_H_
 #define CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_FRAME_H_
 
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/macros.h"
 #include "build/build_config.h"
 #include "chrome/browser/ui/views/frame/browser_non_client_frame_view.h"
 #include "ui/views/context_menu_controller.h"
 #include "ui/views/widget/widget.h"
 
-class AvatarMenuButton;
 class BrowserRootView;
 class BrowserView;
 class NativeBrowserFrame;
 class NonClientFrameView;
 class SystemMenuModelBuilder;
 
 namespace content {
 struct NativeWebKeyboardEvent;
 }
 
@@ skipping 125 matching lines @@
   // Used to show the system menu. Only used if
   // NativeBrowserFrame::UsesNativeSystemMenu() returns false.
   std::unique_ptr<views::MenuRunner> menu_runner_;
 
   std::unique_ptr<ui::EventHandler> browser_command_handler_;
 
   DISALLOW_COPY_AND_ASSIGN(BrowserFrame);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_FRAME_BROWSER_FRAME_H_