Move Singleton and related structs to namespace base

remoting/host/win/host_service.h

 // 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.
 
 #ifndef REMOTING_HOST_WIN_HOST_SERVICE_H_
 #define REMOTING_HOST_WIN_HOST_SERVICE_H_
 
 #include <windows.h>
 
 #include <list>
@@ skipping 104 matching lines @@
 
   // A waitable event that is used to wait until the service is stopped.
   base::WaitableEvent stopped_event_;
 
   base::WeakPtr<HostService> weak_ptr_;
 
   // Used to post session change notifications and control events.
   base::WeakPtrFactory<HostService> weak_factory_;
 
   // Singleton.
-  friend struct DefaultSingletonTraits<HostService>;
+  friend struct base::DefaultSingletonTraits<HostService>;
 
   DISALLOW_COPY_AND_ASSIGN(HostService);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_WIN_HOST_SERVICE_H_