get rid of old options pages

chrome/browser/ui/webui/options2/chromeos/proxy_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_PROXY_HANDLER2_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_PROXY_HANDLER2_H_
 
 #include "base/compiler_specific.h"
 #include "chrome/browser/ui/webui/options2/options_ui2.h"
 
 namespace chromeos {
 namespace options2 {
 
 // ChromeOS proxy options page UI handler.
-class ProxyHandler : public OptionsPageUIHandler {
+class ProxyHandler : public ::options2::OptionsPageUIHandler {
  public:
   explicit ProxyHandler();
   virtual ~ProxyHandler();
 
   // OptionsPageUIHandler implementation.
   virtual void GetLocalizedValues(
       base::DictionaryValue* localized_strings) OVERRIDE;
 
   // Set network name for proxy page title.
   void SetNetworkName(const std::string& name);
 
  private:
 
   DISALLOW_COPY_AND_ASSIGN(ProxyHandler);
 };
 
 }  // namespace options2
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS2_CHROMEOS_PROXY_HANDLER2_H_