PART1: Initiated the SignedSettings refactoring.

chrome/browser/ui/webui/options/chromeos/system_options_handler.h

 // Copyright (c) 2011 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_OPTIONS_CHROMEOS_SYSTEM_OPTIONS_HANDLER_H_
 #define CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_SYSTEM_OPTIONS_HANDLER_H_
 #pragma once
 
 #include "base/memory/weak_ptr.h"
-#include "chrome/browser/ui/webui/options/chromeos/cros_options_page_ui_handler.h"
+#include "chrome/browser/ui/webui/options/options_ui.h"
 
 namespace base {
 class DictionaryValue;
 }
 
 // ChromeOS system options page UI handler.
 class SystemOptionsHandler
-  : public chromeos::CrosOptionsPageUIHandler,
+  : public OptionsPageUIHandler,
     public base::SupportsWeakPtr<SystemOptionsHandler> {
  public:
   SystemOptionsHandler();
   virtual ~SystemOptionsHandler();
 
   // OptionsPageUIHandler implementation.
   virtual void GetLocalizedValues(base::DictionaryValue* localized_strings);
   virtual void Initialize();
 
   virtual void RegisterMessages();
@@ skipping 10 matching lines @@
   void IncreaseScreenBrightnessCallback(const base::ListValue* args);
 
  private:
   // Callback for TouchpadHelper.
   void TouchpadExists(bool* exists);
 
   DISALLOW_COPY_AND_ASSIGN(SystemOptionsHandler);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_SYSTEM_OPTIONS_HANDLER_H_