Introduce PrefRegistrySyncable, simplifying PrefServiceSyncable.

chrome/browser/ui/webui/ntp/new_tab_ui.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_NTP_NEW_TAB_UI_H_
 #define CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_UI_H_
 
 #include <map>
 #include <string>
 
 #include "base/gtest_prod_util.h"
 #include "base/prefs/public/pref_change_registrar.h"
 #include "base/time.h"
 #include "base/timer.h"
 #include "chrome/browser/sessions/tab_restore_service.h"
-#include "content/public/browser/url_data_source.h"
 #include "content/public/browser/notification_observer.h"
 #include "content/public/browser/notification_registrar.h"
+#include "content/public/browser/url_data_source.h"
 #include "content/public/browser/web_ui_controller.h"
 
 class GURL;
-class PrefServiceSyncable;
+class PrefRegistrySyncable;
 class Profile;
 
 namespace base {
 class DictionaryValue;
 }
 
 // The WebContents used for the New Tab page.
 class NewTabUI : public content::WebUIController,
                  public content::NotificationObserver {
  public:
   explicit NewTabUI(content::WebUI* web_ui);
   virtual ~NewTabUI();
 
-  static void RegisterUserPrefs(PrefServiceSyncable* prefs);
+  static void RegisterUserPrefs(PrefRegistrySyncable* registry);
 
   // Returns whether or not to show apps pages.
   static bool ShouldShowApps();
 
   // Returns whether or not "Discovery" in the NTP is Enabled.
   static bool IsDiscoveryInNTPEnabled();
 
   // Adds "url", "title", and "direction" keys on incoming dictionary, setting
   // title as the url as a fallback on empty title.
   static void SetUrlTitleAndDirection(base::DictionaryValue* dictionary,
@@ skipping 84 matching lines @@
 
   // If the sync promo NTP bubble is being shown.
   bool showing_sync_bubble_;
 
   PrefChangeRegistrar pref_change_registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(NewTabUI);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBUI_NTP_NEW_TAB_UI_H_