Stub classes for Chromoting and use them in HostMessageDispatcher.

remoting/protocol/host_control_message_handler.h

-// Copyright (c) 2010 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_PROTOCOL_HOST_CONTROL_MESSAGE_HANDLER_H_
-#define REMOTING_PROTOCOL_HOST_CONTROL_MESSAGE_HANDLER_H_
-
-#include "remoting/proto/control.pb.h"
-
-class Task;
-
-namespace remoting {
-
-// The interface for handling control messages sent to the host.
-// For all methods of this interface. |task| needs to be called when
-// receiver is done processing the event.
-class HostControlMessageHandler {
- public:
-  virtual ~HostControlMessageHandler() {}
-
-  virtual void OnSuggestScreenResolutionRequest(
-      const SuggestScreenResolutionRequest& request, Task* task) = 0;
-};
-
-}  // namespace remoting
-
-#endif  // REMOTING_PROTOCOL_HOST_CONTROL_MESSAGE_HANDLER_H_