Introduce PrefRegistrySyncable, simplifying PrefServiceSyncable.

chrome/browser/ui/webui/instant_ui.cc

 // 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.
 
 #include "chrome/browser/ui/webui/instant_ui.h"
 
 #include "base/bind.h"
 #include "base/stringprintf.h"
 #include "base/time.h"
 #include "chrome/browser/instant/instant_controller.h"
+#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/browser.h"
 #include "chrome/browser/ui/browser_finder.h"
 #include "chrome/browser/ui/browser_instant_controller.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "content/public/browser/web_ui.h"
 #include "content/public/browser/web_ui_data_source.h"
 #include "content/public/browser/web_ui_message_handler.h"
@@ skipping 121 matching lines @@
 
 InstantUI::InstantUI(content::WebUI* web_ui) : WebUIController(web_ui) {
   web_ui->AddMessageHandler(new InstantUIMessageHandler());
 
   // Set up the chrome://instant/ source.
   Profile* profile = Profile::FromWebUI(web_ui);
   content::WebUIDataSource::Add(profile, CreateInstantHTMLSource());
 }
 
 // static
-void InstantUI::RegisterUserPrefs(PrefServiceSyncable* user_prefs) {
-  user_prefs->RegisterStringPref(prefs::kInstantUIZeroSuggestUrlPrefix, "",
-                                 PrefServiceSyncable::UNSYNCABLE_PREF);
+void InstantUI::RegisterUserPrefs(PrefRegistrySyncable* registry) {
+  registry->RegisterStringPref(prefs::kInstantUIZeroSuggestUrlPrefix, "",
+                               PrefRegistrySyncable::UNSYNCABLE_PREF);
 }