Move Singleton and related structs to namespace base

chrome/browser/ui/search/new_tab_page_interceptor_service_factory.cc

 // Copyright 2015 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/search/new_tab_page_interceptor_service_factory.h"
 
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/instant_service_factory.h"
 #include "chrome/browser/search_engines/template_url_service_factory.h"
 #include "chrome/browser/ui/search/new_tab_page_interceptor_service.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "content/public/browser/browser_thread.h"
 
 // static
 NewTabPageInterceptorServiceFactory*
 NewTabPageInterceptorServiceFactory::GetInstance() {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
-  return Singleton<NewTabPageInterceptorServiceFactory>::get();
+  return base::Singleton<NewTabPageInterceptorServiceFactory>::get();
 }
 
 // static
 NewTabPageInterceptorService*
 NewTabPageInterceptorServiceFactory::GetForProfile(Profile* profile) {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   if (profile->IsOffTheRecord())
     return nullptr;
 
   return static_cast<NewTabPageInterceptorService*>(
@@ skipping 10 matching lines @@
 
 NewTabPageInterceptorServiceFactory::~NewTabPageInterceptorServiceFactory() {
 }
 
 KeyedService* NewTabPageInterceptorServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   DCHECK_CURRENTLY_ON(content::BrowserThread::UI);
   Profile* profile = Profile::FromBrowserContext(context);
   return new NewTabPageInterceptorService(profile);
 }