get rid of old options pages

chrome/browser/ui/webui/options2/chromeos/set_wallpaper_options_handler2.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_WEBUI_OPTIONS2_CHROMEOS_SET_WALLPAPER_OPTIONS_HANDLER2_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_SET_WALLPAPER_OPTIONS_HANDLER2_H_
 
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/ui/webui/options2/options_ui2.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace base {
 class DictionaryValue;
 class ListValue;
 }
 
 namespace chromeos {
 namespace options2 {
 
 // ChromeOS user image options page UI handler.
-class SetWallpaperOptionsHandler : public OptionsPageUIHandler{
+class SetWallpaperOptionsHandler : public ::options2::OptionsPageUIHandler{
  public:
   SetWallpaperOptionsHandler();
   virtual ~SetWallpaperOptionsHandler();
 
   // OptionsPageUIHandler implementation.
   virtual void GetLocalizedValues(
       base::DictionaryValue* localized_strings) OVERRIDE;
 
   // WebUIMessageHandler implementation.
   virtual void RegisterMessages() OVERRIDE;
@@ skipping 16 matching lines @@
 
   base::WeakPtrFactory<SetWallpaperOptionsHandler> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SetWallpaperOptionsHandler);
 };
 
 }  // namespace options2
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_SET_WALLPAPER_OPTIONS_HANDLER2_H_