Move Singleton and related structs to namespace base

chrome/browser/dom_distiller/dom_distiller_service_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/dom_distiller/dom_distiller_service_factory.h"
 
 #include "base/threading/sequenced_worker_pool.h"
 #include "chrome/browser/profiles/incognito_helpers.h"
 #include "chrome/browser/profiles/profile.h"
 #include "components/dom_distiller/content/browser/distiller_page_web_contents.h"
@@ skipping 14 matching lines @@
     scoped_ptr<DistillerPageFactory> distiller_page_factory,
     scoped_ptr<DistilledPagePrefs> distilled_page_prefs)
     : DomDistillerService(store.Pass(),
                           distiller_factory.Pass(),
                           distiller_page_factory.Pass(),
                           distilled_page_prefs.Pass()) {
 }
 
 // static
 DomDistillerServiceFactory* DomDistillerServiceFactory::GetInstance() {
-  return Singleton<DomDistillerServiceFactory>::get();
+  return base::Singleton<DomDistillerServiceFactory>::get();
 }
 
 // static
 DomDistillerContextKeyedService*
 DomDistillerServiceFactory::GetForBrowserContext(
     content::BrowserContext* context) {
   return static_cast<DomDistillerContextKeyedService*>(
       GetInstance()->GetServiceForBrowserContext(context, true));
 }
 
@@ skipping 44 matching lines @@
   return service;
 }
 
 content::BrowserContext* DomDistillerServiceFactory::GetBrowserContextToUse(
     content::BrowserContext* context) const {
   // Makes normal profile and off-the-record profile use same service instance.
   return chrome::GetBrowserContextRedirectedInIncognito(context);
 }
 
 }  // namespace dom_distiller