Standardize usage of virtual/override/final in remoting/

remoting/protocol/client_stub.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.
 
 // Interface of a client that receives commands from a Chromoting host.
 //
 // This interface is responsible for a subset of control messages sent to
 // the Chromoting client.
 
 #ifndef REMOTING_PROTOCOL_CLIENT_STUB_H_
 #define REMOTING_PROTOCOL_CLIENT_STUB_H_
 
 #include "base/basictypes.h"
 #include "remoting/protocol/clipboard_stub.h"
 #include "remoting/protocol/cursor_shape_stub.h"
 
 namespace remoting {
 namespace protocol {
 
 class Capabilities;
 class ExtensionMessage;
 class PairingResponse;
 
 class ClientStub : public ClipboardStub,
                    public CursorShapeStub {
  public:
   ClientStub() {}
-  virtual ~ClientStub() {}
+  ~ClientStub() override {}
 
   // Passes the set of capabilities supported by the host to the client.
   virtual void SetCapabilities(const Capabilities& capabilities) = 0;
 
   // Passes a pairing response message to the client.
   virtual void SetPairingResponse(const PairingResponse& pairing_response) = 0;
 
   // Deliver an extension message from the host to the client.
   virtual void DeliverHostMessage(const ExtensionMessage& message) = 0;
 
  private:
   DISALLOW_COPY_AND_ASSIGN(ClientStub);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_CLIENT_STUB_H_