Move Singleton and related structs to namespace base

extensions/browser/api/device_permissions_manager.cc

 // Copyright 2014 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 "extensions/browser/api/device_permissions_manager.h"
 
 #include "base/bind.h"
 #include "base/memory/singleton.h"
 #include "base/strings/string_number_conversions.h"
 #include "base/strings/stringprintf.h"
@@ skipping 683 matching lines @@
 // static
 DevicePermissionsManager* DevicePermissionsManagerFactory::GetForBrowserContext(
     content::BrowserContext* context) {
   return static_cast<DevicePermissionsManager*>(
       GetInstance()->GetServiceForBrowserContext(context, true));
 }
 
 // static
 DevicePermissionsManagerFactory*
 DevicePermissionsManagerFactory::GetInstance() {
-  return Singleton<DevicePermissionsManagerFactory>::get();
+  return base::Singleton<DevicePermissionsManagerFactory>::get();
 }
 
 DevicePermissionsManagerFactory::DevicePermissionsManagerFactory()
     : BrowserContextKeyedServiceFactory(
           "DevicePermissionsManager",
           BrowserContextDependencyManager::GetInstance()) {
 }
 
 DevicePermissionsManagerFactory::~DevicePermissionsManagerFactory() {
 }
 
 KeyedService* DevicePermissionsManagerFactory::BuildServiceInstanceFor(
     content::BrowserContext* context) const {
   return new DevicePermissionsManager(context);
 }
 
 BrowserContext* DevicePermissionsManagerFactory::GetBrowserContextToUse(
     BrowserContext* context) const {
   // Return the original (possibly off-the-record) browser context so that a
   // separate instance of the DevicePermissionsManager is used in incognito
   // mode. The parent class's implemenation returns NULL.
   return context;
 }
 
 }  // namespace extensions