[Chromoting] Add plumbing to carry clipboard events from the host to the client.

remoting/protocol/client_control_dispatcher.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.
 
 #ifndef REMOTING_PROTOCOL_CLIENT_CONTROL_DISPATCHER_H_
 #define REMOTING_PROTOCOL_CLIENT_CONTROL_DISPATCHER_H_
 
 #include "base/memory/ref_counted.h"
 #include "remoting/protocol/channel_dispatcher_base.h"
 #include "remoting/protocol/clipboard_stub.h"
 #include "remoting/protocol/host_stub.h"
 #include "remoting/protocol/message_reader.h"
 
 namespace remoting {
 namespace protocol {
 
 class ClientStub;
 class ControlMessage;
 class BufferedSocketWriter;
 class Session;
 
 // ClientControlDispatcher dispatches incoming messages on the control
-// channel to ClientStub, and also implements ClipboardStub and HostStub for
-// outgoing messages.
+// channel to ClientStub or ClipboardStub, and also implements ClipboardStub
+// and HostStub for outgoing messages.
 class ClientControlDispatcher : public ChannelDispatcherBase,
                                 public ClipboardStub,
                                 public HostStub {
  public:
   ClientControlDispatcher();
   virtual ~ClientControlDispatcher();
 
   // ClipboardStub implementation.
   virtual void InjectClipboardEvent(const ClipboardEvent& event) OVERRIDE;
 
-  // Sets ClientStub that will be called for each incoming control
-  // message. Doesn't take ownership of |client_stub|. It must outlive
-  // this dispatcher.
+  // Sets the ClientStub that will be called for each incoming control
+  // message. |client_stub| must outlive this object.
   void set_client_stub(ClientStub* client_stub) { client_stub_ = client_stub; }
 
+  // Sets the ClipboardStub that will be called for each incoming clipboard
+  // message. |clipboard_stub| must outlive this object.
+  void set_clipboard_stub(ClipboardStub* clipboard_stub) {
+    clipboard_stub_ = clipboard_stub;
+  }
+
  protected:
   // ChannelDispatcherBase overrides.
   virtual void OnInitialized() OVERRIDE;
 
  private:
   void OnMessageReceived(scoped_ptr<ControlMessage> message,
                          const base::Closure& done_task);
 
   ClientStub* client_stub_;
+  ClipboardStub* clipboard_stub_;
 
   ProtobufMessageReader<ControlMessage> reader_;
   scoped_refptr<BufferedSocketWriter> writer_;
 
   DISALLOW_COPY_AND_ASSIGN(ClientControlDispatcher);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_CLIENT_CONTROL_DISPATCHER_H_