Convert //remoting to use std::unique_ptr

remoting/host/security_key/gnubby_extension.h

 // Copyright 2016 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_SECURITY_KEY_GNUBBY_EXTENSION_H_
 #define REMOTING_HOST_SECURITY_KEY_GNUBBY_EXTENSION_H_
 
+#include <memory>
 #include <string>
 
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "remoting/host/host_extension.h"
 
 namespace remoting {
 
 // GnubbyExtension extends HostExtension to enable Security Key support.
 class GnubbyExtension : public HostExtension {
  public:
   GnubbyExtension();
   ~GnubbyExtension() override;
 
   // HostExtension interface.
   std::string capability() const override;
-  scoped_ptr<HostExtensionSession> CreateExtensionSession(
+  std::unique_ptr<HostExtensionSession> CreateExtensionSession(
       ClientSessionControl* client_session_control,
       protocol::ClientStub* client_stub) override;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(GnubbyExtension);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_HOST_SECURITY_KEY_GNUBBY_EXTENSION_H_