get rid of old options pages

chrome/browser/ui/webui/options2/chromeos/keyboard_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_KEYBOARD_HANDLER2_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_KEYBOARD_HANDLER2_H_
 #pragma once
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/prefs/pref_member.h"
 #include "chrome/browser/ui/webui/options2/options_ui2.h"
 
 namespace chromeos {
 namespace options2 {
 
 // Customize modifier keys overlay page UI handler.
-class KeyboardHandler : public OptionsPageUIHandler {
+class KeyboardHandler : public ::options2::OptionsPageUIHandler {
  public:
   KeyboardHandler();
   virtual ~KeyboardHandler();
 
   // OptionsPageUIHandler implementation.
   virtual void GetLocalizedValues(DictionaryValue* localized_strings) OVERRIDE;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(KeyboardHandler);
 };
 
 }  // namespace options2
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_KEYBOARD_HANDLER2_H_