Move Singleton and related structs to namespace base

chrome/browser/ui/global_error/global_error_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/ui/global_error/global_error_service_factory.h"
 
 #include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/ui/global_error/global_error_service.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 
 // static
 GlobalErrorService* GlobalErrorServiceFactory::GetForProfile(Profile* profile) {
   return static_cast<GlobalErrorService*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
 GlobalErrorServiceFactory* GlobalErrorServiceFactory::GetInstance() {
-  return Singleton<GlobalErrorServiceFactory>::get();
+  return base::Singleton<GlobalErrorServiceFactory>::get();
 }
 
 GlobalErrorServiceFactory::GlobalErrorServiceFactory()
     : BrowserContextKeyedServiceFactory(
         "GlobalErrorService",
         BrowserContextDependencyManager::GetInstance()) {
 }
 
 GlobalErrorServiceFactory::~GlobalErrorServiceFactory() {
 }
 
 KeyedService* GlobalErrorServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   return new GlobalErrorService(static_cast<Profile*>(profile));
 }
 
 content::BrowserContext* GlobalErrorServiceFactory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   return chrome::GetBrowserContextRedirectedInIncognito(context);
 }