Update {virtual,override} to follow C++11 style in remoting.

remoting/host/win/rdp_client.cc

 // Copyright (c) 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/win/rdp_client.h"
 
 #include <windows.h>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 38 matching lines @@
   void Connect(const webrtc::DesktopSize& screen_size,
                const std::string& terminal_id);
 
   // Initiates a graceful shutdown of the RDP connection.
   void Disconnect();
 
   // Sends Secure Attention Sequence to the session.
   void InjectSas();
 
   // RdpClientWindow::EventHandler interface.
-  virtual void OnConnected() override;
-  virtual void OnDisconnected() override;
+  void OnConnected() override;
+  void OnDisconnected() override;
 
  private:
   friend class base::RefCountedThreadSafe<Core>;
-  virtual ~Core();
+  ~Core() override;
 
   // Helpers for the event handler's methods that make sure that OnRdpClosed()
   // is the last notification delivered and is delevered only once.
   void NotifyConnected();
   void NotifyClosed();
 
   // Task runner on which the caller expects |event_handler_| to be notified.
   scoped_refptr<base::SingleThreadTaskRunner> caller_task_runner_;
 
   // Task runner on which |rdp_client_window_| is running.
@@ skipping 152 matching lines @@
   }
 
   if (event_handler_) {
     RdpClient::EventHandler* event_handler = event_handler_;
     event_handler_ = nullptr;
     event_handler->OnRdpClosed();
   }
 }
 
 }  // namespace remoting