Move Singleton and related structs to namespace base

chrome/browser/policy/cloud/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/cloud/user_policy_signin_service_factory.h"
 
 #include "base/memory/ref_counted.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/browser_process.h"
 #include "chrome/browser/policy/cloud/user_cloud_policy_manager_factory.h"
@@ skipping 34 matching lines @@
 
 // static
 UserPolicySigninService* UserPolicySigninServiceFactory::GetForProfile(
     Profile* profile) {
   return static_cast<UserPolicySigninService*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
 UserPolicySigninServiceFactory* UserPolicySigninServiceFactory::GetInstance() {
-  return Singleton<UserPolicySigninServiceFactory>::get();
+  return base::Singleton<UserPolicySigninServiceFactory>::get();
 }
 
 // static
 void UserPolicySigninServiceFactory::SetDeviceManagementServiceForTesting(
     DeviceManagementService* device_management_service) {
   g_device_management_service = device_management_service;
 }
 
 KeyedService* UserPolicySigninServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
@@ skipping 30 matching lines @@
 }
 
 void UserPolicySigninServiceFactory::RegisterProfilePrefs(
     user_prefs::PrefRegistrySyncable* user_prefs) {
 #if defined(OS_ANDROID) || defined(OS_IOS)
   user_prefs->RegisterInt64Pref(prefs::kLastPolicyCheckTime, 0);
 #endif
 }
 
 }  // namespace policy