Add the plumbing that will carry a clipboard item from a chromoting client to a host.

remoting/protocol/key_event_tracker.h

 // Copyright (c) 2011 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_KEY_EVENT_TRACKER_H_
 #define REMOTING_PROTOCOL_KEY_EVENT_TRACKER_H_
 
 #include <set>
 
 #include "base/basictypes.h"
 #include "base/compiler_specific.h"
 #include "remoting/protocol/input_stub.h"
 
 namespace remoting {
 namespace protocol {
 
 // Filtering InputStub which tracks key press and release events before passing
 // them on to |input_stub|, and can dispatch release events to |input_stub| for
 // all currently-pressed keys when necessary.
 class KeyEventTracker : public InputStub {
  public:
   KeyEventTracker(protocol::InputStub* input_stub);
   virtual ~KeyEventTracker();
 
   // Dispatch release events for all currently-pressed keys to the InputStub.
   void ReleaseAllKeys();
 
   // InputStub interface.
+  virtual void InjectClipboardEvent(const ClipboardEvent& event) OVERRIDE;
   virtual void InjectKeyEvent(const KeyEvent& event) OVERRIDE;
   virtual void InjectMouseEvent(const MouseEvent& event) OVERRIDE;
 
  private:
   protocol::InputStub* input_stub_;
 
   std::set<int> pressed_keys_;
 
   DISALLOW_COPY_AND_ASSIGN(KeyEventTracker);
 };
 
 }  // namespace protocol
 }  // namespace remoting
 
 #endif  // REMOTING_PROTOCOL_KEY_EVENT_TRACKER_H_