chrome: Cleanup class/struct forward declarations

chrome/browser/ui/webui/extensions/chromeos/kiosk_apps_handler.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_WEBUI_EXTENSIONS_CHROMEOS_KIOSK_APPS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_EXTENSIONS_CHROMEOS_KIOSK_APPS_HANDLER_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_manager.h"
 #include "chrome/browser/chromeos/app_mode/kiosk_app_manager_observer.h"
 #include "content/public/browser/web_ui_message_handler.h"
 
 namespace base {
-class DictionaryValue;
 class ListValue;
 }
 
 namespace content {
 class WebUIDataSource;
 }
 
 namespace chromeos {
 
 class KioskAppManager;
@@ skipping 44 matching lines @@
   bool is_auto_launch_enabled_;
   OwnerSettingsServiceChromeOS* const owner_settings_service_;  // not owned
   base::WeakPtrFactory<KioskAppsHandler> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(KioskAppsHandler);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_EXTENSIONS_CHROMEOS_KIOSK_APPS_HANDLER_H_