chrome: Cleanup class/struct forward declarations

chrome/browser/ui/views/create_application_shortcut_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_CREATE_APPLICATION_SHORTCUT_VIEW_H_
 #define CHROME_BROWSER_UI_VIEWS_CREATE_APPLICATION_SHORTCUT_VIEW_H_
 
 #include <memory>
 #include <string>
 #include <vector>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "chrome/browser/web_applications/web_app.h"
 #include "extensions/common/manifest_handlers/file_handler_info.h"
 #include "ui/views/controls/button/button.h"
 #include "ui/views/window/dialog_delegate.h"
 
-class FaviconDownloadHelper;
 class GURL;
 class Profile;
 class SkBitmap;
 
 namespace content {
 class WebContents;
 }
 
 namespace extensions {
 class Extension;
@@ skipping 120 matching lines @@
                        const extensions::FileHandlersInfo& file_handlers_info);
 
   base::Callback<void(bool)> close_callback_;
 
   base::WeakPtrFactory<CreateChromeApplicationShortcutView> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(CreateChromeApplicationShortcutView);
 };
 
 #endif  // CHROME_BROWSER_UI_VIEWS_CREATE_APPLICATION_SHORTCUT_VIEW_H_