Introduce PrefRegistrySyncable, simplifying PrefServiceSyncable.

chrome/browser/ui/webui/ntp/most_visited_handler.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/ntp/most_visited_handler.h"
 
 #include <set>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
 #include "base/command_line.h"
 #include "base/md5.h"
 #include "base/memory/scoped_vector.h"
 #include "base/memory/singleton.h"
 #include "base/metrics/histogram.h"
 #include "base/string16.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/threading/thread.h"
 #include "base/utf_string_conversions.h"
 #include "base/values.h"
 #include "chrome/browser/history/page_usage_data.h"
 #include "chrome/browser/history/top_sites.h"
+#include "chrome/browser/prefs/pref_registry_syncable.h"
 #include "chrome/browser/prefs/pref_service.h"
 #include "chrome/browser/prefs/scoped_user_pref_update.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/webui/favicon_source.h"
 #include "chrome/browser/ui/webui/ntp/new_tab_ui.h"
 #include "chrome/browser/ui/webui/ntp/ntp_stats.h"
 #include "chrome/browser/ui/webui/ntp/thumbnail_source.h"
 #include "chrome/common/chrome_notification_types.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
@@ skipping 216 matching lines @@
   if (ts)
     ts->AddBlacklistedURL(url);
   content::RecordAction(UserMetricsAction("MostVisited_UrlBlacklisted"));
 }
 
 std::string MostVisitedHandler::GetDictionaryKeyForUrl(const std::string& url) {
   return base::MD5String(url);
 }
 
 // static
-void MostVisitedHandler::RegisterUserPrefs(PrefServiceSyncable* prefs) {
-  prefs->RegisterDictionaryPref(prefs::kNtpMostVisitedURLsBlacklist,
-                                PrefServiceSyncable::UNSYNCABLE_PREF);
+void MostVisitedHandler::RegisterUserPrefs(PrefRegistrySyncable* registry) {
+  registry->RegisterDictionaryPref(prefs::kNtpMostVisitedURLsBlacklist,
+                                   PrefRegistrySyncable::UNSYNCABLE_PREF);
 }