Move Singleton and related structs to namespace base

chrome/browser/chromeos/app_mode/kiosk_app_update_service.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_UPDATE_SERVICE_H_
 #define CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_UPDATE_SERVICE_H_
 
 #include <string>
 
 #include "base/basictypes.h"
@@ skipping 69 matching lines @@
 class KioskAppUpdateServiceFactory : public BrowserContextKeyedServiceFactory {
  public:
   // Returns the KioskAppUpdateService for |profile|, creating it if it is not
   // yet created.
   static KioskAppUpdateService* GetForProfile(Profile* profile);
 
   // Returns the KioskAppUpdateServiceFactory instance.
   static KioskAppUpdateServiceFactory* GetInstance();
 
  private:
-  friend struct DefaultSingletonTraits<KioskAppUpdateServiceFactory>;
+  friend struct base::DefaultSingletonTraits<KioskAppUpdateServiceFactory>;
 
   KioskAppUpdateServiceFactory();
   ~KioskAppUpdateServiceFactory() override;
 
   // BrowserContextKeyedServiceFactory overrides:
   KeyedService* BuildServiceInstanceFor(
       content::BrowserContext* profile) const override;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_APP_MODE_KIOSK_APP_UPDATE_SERVICE_H_