Move Singleton and related structs to namespace base

chrome/browser/search_engines/template_url_fetcher_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/search_engines/template_url_fetcher_factory.h"
 
 #include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/search_engines/template_url_fetcher.h"
 
 // static
 TemplateURLFetcher* TemplateURLFetcherFactory::GetForProfile(
     Profile* profile) {
   return static_cast<TemplateURLFetcher*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
 TemplateURLFetcherFactory* TemplateURLFetcherFactory::GetInstance() {
-  return Singleton<TemplateURLFetcherFactory>::get();
+  return base::Singleton<TemplateURLFetcherFactory>::get();
 }
 
 // static
 void TemplateURLFetcherFactory::ShutdownForProfile(Profile* profile) {
   TemplateURLFetcherFactory* factory = GetInstance();
   factory->BrowserContextShutdown(profile);
   factory->BrowserContextDestroyed(profile);
 }
 
 TemplateURLFetcherFactory::TemplateURLFetcherFactory()
@@ skipping 10 matching lines @@
     content::BrowserContext* profile) const {
   return new TemplateURLFetcher(
       TemplateURLServiceFactory::GetForProfile(static_cast<Profile*>(profile)),
       profile->GetRequestContext());
 }
 
 content::BrowserContext* TemplateURLFetcherFactory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   return chrome::GetBrowserContextRedirectedInIncognito(context);
 }