Move Singleton and related structs to namespace base

chrome/browser/captive_portal/captive_portal_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/captive_portal/captive_portal_service_factory.h"
 
 #include "chrome/browser/captive_portal/captive_portal_service.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 
 // static
 CaptivePortalService* CaptivePortalServiceFactory::GetForProfile(
     Profile* profile) {
   return static_cast<CaptivePortalService*>(
       GetInstance()->GetServiceForBrowserContext(profile, true));
 }
 
 // static
 CaptivePortalServiceFactory* CaptivePortalServiceFactory::GetInstance() {
-  return Singleton<CaptivePortalServiceFactory>::get();
+  return base::Singleton<CaptivePortalServiceFactory>::get();
 }
 
 CaptivePortalServiceFactory::CaptivePortalServiceFactory()
     : BrowserContextKeyedServiceFactory(
         "CaptivePortalService",
         BrowserContextDependencyManager::GetInstance()) {
 }
 
 CaptivePortalServiceFactory::~CaptivePortalServiceFactory() {
 }
 
 KeyedService* CaptivePortalServiceFactory::BuildServiceInstanceFor(
     content::BrowserContext* profile) const {
   return new CaptivePortalService(static_cast<Profile*>(profile));
 }
 
 content::BrowserContext* CaptivePortalServiceFactory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   return chrome::GetBrowserContextOwnInstanceInIncognito(context);
 }