Use PrefChangeRegistrar everywhere

chrome/browser/dom_ui/core_options_handler.h

 // Copyright (c) 2010 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_DOM_UI_CORE_OPTIONS_HANDLER_H_
 #define CHROME_BROWSER_DOM_UI_CORE_OPTIONS_HANDLER_H_
 #pragma once
 
 #include <map>
 #include <string>
 
 #include "base/values.h"
 #include "chrome/browser/dom_ui/options_ui.h"
+#include "chrome/browser/prefs/pref_change_registrar.h"
 
 // Core options UI handler.
 // Handles resource and JS calls common to all options sub-pages.
 class CoreOptionsHandler : public OptionsPageUIHandler {
  public:
   CoreOptionsHandler();
 
   // OptionsUIHandler implementation.
   virtual void GetLocalizedValues(DictionaryValue* localized_strings);
   virtual void Uninitialize();
 
-
   // NotificationObserver implementation.
   virtual void Observe(NotificationType type,
                        const NotificationSource& source,
                        const NotificationDetails& details);
 
   // DOMMessageHandler implementation.
   virtual void RegisterMessages();
+  virtual DOMMessageHandler* Attach(DOMUI* dom_ui);
 
  protected:
   // Fetches a pref value of given |pref_name|.
   // Note that caller owns the returned Value.
   virtual Value* FetchPref(const std::string& pref_name);
 
   // Observes a pref of given |pref_name|.
   virtual void ObservePref(const std::string& pref_name);
 
   // Sets a pref value |value_string| of |pref_type| to given |pref_name|.
@@ skipping 37 matching lines @@
   void HandleSetObjectPref(const ListValue* args);
 
   void HandleSetPref(const ListValue* args, Value::ValueType type);
 
   // Callback for the "coreOptionsUserMetricsAction" message.  This records
   // an action that should be tracked if metrics recording is enabled.
   void HandleUserMetricsAction(const ListValue* args);
 
   void NotifyPrefChanged(const std::string* pref_name);
 
+  PrefChangeRegistrar registrar_;
+
   DISALLOW_COPY_AND_ASSIGN(CoreOptionsHandler);
 };
 
 #endif  // CHROME_BROWSER_DOM_UI_CORE_OPTIONS_HANDLER_H_