Move Singleton and related structs to namespace base

chrome/browser/prerender/prerender_link_manager_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/prerender/prerender_link_manager_factory.h"
 
 #include "chrome/browser/prerender/prerender_link_manager.h"
 #include "chrome/browser/prerender/prerender_manager.h"
 #include "chrome/browser/prerender/prerender_manager_factory.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 
 namespace prerender {
 
 // static
 PrerenderLinkManager* PrerenderLinkManagerFactory::GetForProfile(
     Profile* profile) {
   return static_cast<PrerenderLinkManager*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
 PrerenderLinkManagerFactory* PrerenderLinkManagerFactory::GetInstance() {
-  return Singleton<PrerenderLinkManagerFactory>::get();
+  return base::Singleton<PrerenderLinkManagerFactory>::get();
 }
 
 PrerenderLinkManagerFactory::PrerenderLinkManagerFactory()
     : BrowserContextKeyedServiceFactory(
         "PrerenderLinkmanager",
         BrowserContextDependencyManager::GetInstance()) {
   DependsOn(prerender::PrerenderManagerFactory::GetInstance());
 }
 
 KeyedService* PrerenderLinkManagerFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   PrerenderManager* prerender_manager =
       PrerenderManagerFactory::GetForProfile(static_cast<Profile*>(profile));
   if (!prerender_manager)
     return NULL;
   PrerenderLinkManager* prerender_link_manager =
       new PrerenderLinkManager(prerender_manager);
   return prerender_link_manager;
 }
 
 content::BrowserContext* PrerenderLinkManagerFactory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   return chrome::GetBrowserContextOwnInstanceInIncognito(context);
 }
 
 }  // namespace prerender