Move Singleton and related structs to namespace base

extensions/browser/api/networking_private/networking_private_delegate_factory.h

 // 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.
 #ifndef EXTENSIONS_BROWSER_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_DELEGATE_FACTORY_H_
 #define EXTENSIONS_BROWSER_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_DELEGATE_FACTORY_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/singleton.h"
 #include "components/keyed_service/content/browser_context_keyed_service_factory.h"
 #include "extensions/browser/api/networking_private/networking_private_delegate.h"
@@ skipping 44 matching lines @@
 
   // Provide optional factories for creating delegate instances.
   void SetVerifyDelegateFactory(scoped_ptr<VerifyDelegateFactory> factory);
   void SetUIDelegateFactory(scoped_ptr<UIDelegateFactory> factory);
 
   static NetworkingPrivateDelegate* GetForBrowserContext(
       content::BrowserContext* browser_context);
   static NetworkingPrivateDelegateFactory* GetInstance();
 
  private:
-  friend struct DefaultSingletonTraits<NetworkingPrivateDelegateFactory>;
+  friend struct base::DefaultSingletonTraits<NetworkingPrivateDelegateFactory>;
 
   NetworkingPrivateDelegateFactory();
   ~NetworkingPrivateDelegateFactory() override;
 
   // BrowserContextKeyedServiceFactory:
   KeyedService* BuildServiceInstanceFor(
       content::BrowserContext* browser_context) const override;
   content::BrowserContext* GetBrowserContextToUse(
       content::BrowserContext* context) const override;
   bool ServiceIsCreatedWithBrowserContext() const override;
   bool ServiceIsNULLWhileTesting() const override;
 
   scoped_ptr<VerifyDelegateFactory> verify_factory_;
   scoped_ptr<UIDelegateFactory> ui_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NetworkingPrivateDelegateFactory);
 };
 
 }  // namespace extensions
 
 #endif  // EXTENSIONS_BROWSER_API_NETWORKING_PRIVATE_NETWORKING_PRIVATE_DELEGATE_FACTORY_H_