Convert //remoting to use std::unique_ptr

remoting/host/pairing_registry_delegate.cc

 // 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.
 
 #include "remoting/host/pairing_registry_delegate.h"
 
 #include <utility>
 
 #include "base/single_thread_task_runner.h"
 
 namespace remoting {
 
 using protocol::PairingRegistry;
 
 scoped_refptr<PairingRegistry> CreatePairingRegistry(
     scoped_refptr<base::SingleThreadTaskRunner> task_runner) {
   scoped_refptr<PairingRegistry> pairing_registry;
-  scoped_ptr<PairingRegistry::Delegate> delegate(
+  std::unique_ptr<PairingRegistry::Delegate> delegate(
       CreatePairingRegistryDelegate());
   if (delegate) {
     pairing_registry = new PairingRegistry(task_runner, std::move(delegate));
   }
   return pairing_registry;
 }
 
 }  // namespace remoting