Move Singleton and related structs to namespace base

chrome/browser/sync/profile_sync_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/sync/profile_sync_service_factory.h"
 
 #include "base/command_line.h"
 #include "base/memory/singleton.h"
 #include "base/prefs/pref_service.h"
 #include "chrome/browser/autofill/personal_data_manager_factory.h"
@@ skipping 25 matching lines @@
 #include "components/variations/variations_associated_data.h"
 #include "url/gurl.h"
 
 #if defined(ENABLE_EXTENSIONS)
 #include "extensions/browser/extension_system_provider.h"
 #include "extensions/browser/extensions_browser_client.h"
 #endif
 
 // static
 ProfileSyncServiceFactory* ProfileSyncServiceFactory::GetInstance() {
-  return Singleton<ProfileSyncServiceFactory>::get();
+  return base::Singleton<ProfileSyncServiceFactory>::get();
 }
 
 // static
 ProfileSyncService* ProfileSyncServiceFactory::GetForProfile(
     Profile* profile) {
   if (!ProfileSyncService::IsSyncAllowedByFlag())
     return NULL;
 
   // Disable sync experimentally to measure impact on startup time. Supervised
   // users are unaffected, since supervised users rely completely on sync.
@@ skipping 99 matching lines @@
 
   pss->factory()->RegisterDataTypes(pss);
   pss->Initialize();
   return pss;
 }
 
 // static
 bool ProfileSyncServiceFactory::HasProfileSyncService(Profile* profile) {
   return GetInstance()->GetServiceForBrowserContext(profile, false) != NULL;
 }