Move Singleton and related structs to namespace base

chrome/browser/search/hotword_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/search/hotword_service_factory.h"
 
 #include "base/command_line.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/search/hotword_service.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/pref_names.h"
 #include "components/keyed_service/content/browser_context_dependency_manager.h"
 #include "components/pref_registry/pref_registry_syncable.h"
 #include "content/public/browser/browser_context.h"
 #include "content/public/browser/browser_thread.h"
 
 using content::BrowserContext;
 using content::BrowserThread;
 
 // static
 HotwordService* HotwordServiceFactory::GetForProfile(BrowserContext* context) {
   return static_cast<HotwordService*>(
       GetInstance()->GetServiceForBrowserContext(context, true));
 }
 
 // static
 HotwordServiceFactory* HotwordServiceFactory::GetInstance() {
-  return Singleton<HotwordServiceFactory>::get();
+  return base::Singleton<HotwordServiceFactory>::get();
 }
 
 // static
 bool HotwordServiceFactory::IsServiceAvailable(BrowserContext* context) {
   HotwordService* hotword_service = GetForProfile(context);
   return hotword_service && hotword_service->IsServiceAvailable();
 }
 
 // static
 bool HotwordServiceFactory::IsHotwordAllowed(BrowserContext* context) {
@@ skipping 46 matching lines @@
   // Per-device settings (do not sync).
   prefs->RegisterBooleanPref(prefs::kHotwordSearchEnabled, false);
   prefs->RegisterBooleanPref(prefs::kHotwordAlwaysOnSearchEnabled, false);
   prefs->RegisterBooleanPref(prefs::kHotwordAlwaysOnNotificationSeen, false);
 }
 
 KeyedService* HotwordServiceFactory::BuildServiceInstanceFor(
     BrowserContext* context) const {
   return new HotwordService(Profile::FromBrowserContext(context));
 }