components: Move PrefRegistrySyncable into user_prefs namespace.

chrome/browser/background/background_contents_service_factory.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/background/background_contents_service_factory.h"
 
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/background/background_contents_service.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
@@ skipping 23 matching lines @@
 BackgroundContentsServiceFactory::~BackgroundContentsServiceFactory() {
 }
 
 ProfileKeyedService* BackgroundContentsServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   return new BackgroundContentsService(static_cast<Profile*>(profile),
                                        CommandLine::ForCurrentProcess());
 }
 
 void BackgroundContentsServiceFactory::RegisterUserPrefs(
-    PrefRegistrySyncable* user_prefs) {
-  user_prefs->RegisterDictionaryPref(prefs::kRegisteredBackgroundContents,
-                                     PrefRegistrySyncable::UNSYNCABLE_PREF);
+    user_prefs::PrefRegistrySyncable* user_prefs) {
+  user_prefs->RegisterDictionaryPref(
+      prefs::kRegisteredBackgroundContents,
+      user_prefs::PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 content::BrowserContext*
 BackgroundContentsServiceFactory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   return chrome::GetBrowserContextOwnInstanceInIncognito(context);
 }
 
 bool BackgroundContentsServiceFactory::ServiceIsCreatedWithProfile() const {
   return true;
 }
 
 bool BackgroundContentsServiceFactory::ServiceIsNULLWhileTesting() const {
   return true;
 }