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

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