Move Singleton and related structs to namespace base

chrome/browser/precache/precache_manager_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/precache/precache_manager_factory.h"
 
 #include "chrome/browser/history/history_service_factory.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/sync/profile_sync_service_factory.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/keyed_service/core/service_access_type.h"
 #include "components/precache/content/precache_manager.h"
 #include "content/public/browser/browser_context.h"
 
 namespace precache {
 
 // static
 PrecacheManager* PrecacheManagerFactory::GetForBrowserContext(
     content::BrowserContext* browser_context) {
   return static_cast<PrecacheManager*>(
       GetInstance()->GetServiceForBrowserContext(browser_context, true));
 }
 
 // static
 PrecacheManagerFactory* PrecacheManagerFactory::GetInstance() {
-  return Singleton<PrecacheManagerFactory>::get();
+  return base::Singleton<PrecacheManagerFactory>::get();
 }
 
 PrecacheManagerFactory::PrecacheManagerFactory()
     : BrowserContextKeyedServiceFactory(
           "PrecacheManager",
           BrowserContextDependencyManager::GetInstance()) {
 }
 
 PrecacheManagerFactory::~PrecacheManagerFactory() {
 }
 
 KeyedService* PrecacheManagerFactory::BuildServiceInstanceFor(
     content::BrowserContext* browser_context) const {
   return new PrecacheManager(
       browser_context,
       ProfileSyncServiceFactory::GetSyncServiceForBrowserContext(
           browser_context),
       HistoryServiceFactory::GetForProfile(
           Profile::FromBrowserContext(browser_context),
           ServiceAccessType::IMPLICIT_ACCESS));
 }
 
 }  // namespace precache