get rid of old options pages

chrome/browser/ui/webui/options/chromeos/core_chromeos_options_handler.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_OPTIONS_CHROMEOS_CORE_CHROMEOS_OPTIONS_HANDLER_H_
-#define CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_CORE_CHROMEOS_OPTIONS_HANDLER_H_
-#pragma once
-
-#include "base/compiler_specific.h"
-#include "base/memory/weak_ptr.h"
-#include "chrome/browser/ui/webui/options/core_options_handler.h"
-
-class PrefSetObserver;
-
-namespace chromeos {
-
-// CoreChromeOSOptionsHandler handles ChromeOS settings.
-class CoreChromeOSOptionsHandler : public CoreOptionsHandler {
- public:
-  CoreChromeOSOptionsHandler();
-  virtual ~CoreChromeOSOptionsHandler();
-
-  // ::CoreOptionsHandler overrides
-  virtual void InitializeHandler() OVERRIDE;
-  virtual base::Value* FetchPref(const std::string& pref_name) OVERRIDE;
-  virtual void ObservePref(const std::string& pref_name) OVERRIDE;
-  virtual void SetPref(const std::string& pref_name,
-                       const base::Value* value,
-                       const std::string& metric) OVERRIDE;
-  virtual void StopObservingPref(const std::string& path) OVERRIDE;
-
- protected:
-  // content::NotificationObserver implementation.
-  virtual void Observe(int type,
-                       const content::NotificationSource& source,
-                       const content::NotificationDetails& details) OVERRIDE;
-
- private:
-  // Notifies registered JS callbacks on ChromeOS setting change.
-  void NotifySettingsChanged(const std::string* setting_name);
-  void NotifyProxyPrefsChanged();
-
-  // Keeps the track of change caused by the handler to make sure
-  // it does not signal itself again.
-  bool handling_change_;
-
-  scoped_ptr<PrefSetObserver> proxy_prefs_;
-  base::WeakPtrFactory<CoreChromeOSOptionsHandler> pointer_factory_;
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_UI_WEBUI_OPTIONS_CHROMEOS_CORE_CHROMEOS_OPTIONS_HANDLER_H_