Introduce PrefRegistrySyncable, simplifying PrefServiceSyncable.

chrome/browser/policy/user_policy_signin_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/policy/user_policy_signin_service_factory.h"
 
 #include "chrome/browser/policy/user_cloud_policy_manager_factory.h"
 #include "chrome/browser/policy/user_policy_signin_service.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/profiles/profile_dependency_manager.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
 #include "chrome/browser/signin/token_service_factory.h"
 #include "chrome/common/pref_names.h"
 
 namespace policy {
 
 UserPolicySigninServiceFactory::UserPolicySigninServiceFactory()
@@ skipping 23 matching lines @@
   return new UserPolicySigninService(profile);
 }
 
 bool UserPolicySigninServiceFactory::ServiceIsCreatedWithProfile() const {
   // Create this object when the profile is created so it can track any
   // user signin activity.
   return true;
 }
 
 void UserPolicySigninServiceFactory::RegisterUserPrefs(
-    PrefServiceSyncable* user_prefs) {
+    PrefRegistrySyncable* user_prefs) {
   user_prefs->RegisterBooleanPref(prefs::kDisableCloudPolicyOnSignin,
-                                  false, PrefServiceSyncable::UNSYNCABLE_PREF);
+                                  false, PrefRegistrySyncable::UNSYNCABLE_PREF);
 }
 
 }  // namespace policy