Move Singleton and related structs to namespace base

chrome/browser/chromeos/policy/recommendation_restorer_factory.cc

 // Copyright 2013 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/chromeos/policy/recommendation_restorer_factory.h"
 
 #include "chrome/browser/chromeos/policy/recommendation_restorer.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "content/public/browser/browser_context.h"
 
 namespace policy {
 
 // static
 RecommendationRestorerFactory* RecommendationRestorerFactory::GetInstance() {
-  return Singleton<RecommendationRestorerFactory>::get();
+  return base::Singleton<RecommendationRestorerFactory>::get();
 }
 
 // static
 RecommendationRestorer* RecommendationRestorerFactory::GetForProfile(
     Profile* profile) {
   return reinterpret_cast<RecommendationRestorer*>(
           GetInstance()->GetServiceForBrowserContext(profile, false));
 }
 
 KeyedService* RecommendationRestorerFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   return new RecommendationRestorer(static_cast<Profile*>(context));
 }
 
 bool RecommendationRestorerFactory::ServiceIsCreatedWithBrowserContext() const {
   return true;
 }
 
 RecommendationRestorerFactory::RecommendationRestorerFactory()
     : BrowserContextKeyedServiceFactory(
           "RecommendationRestorer",
           BrowserContextDependencyManager::GetInstance()) {
 }
 
 RecommendationRestorerFactory::~RecommendationRestorerFactory() {
 }
 
 }  // namespace policy