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

remoting/protocol/input_stub.h

Index: remoting/protocol/input_stub.h
diff --git a/remoting/protocol/input_stub.h b/remoting/protocol/input_stub.h
index b7ec67e6c8542fbb1a445ff31f8dcb7b840a0556..061aa65a0b794a0444c1f65f7fb0fbc54cd4c5bc 100644
--- a/remoting/protocol/input_stub.h
+++ b/remoting/protocol/input_stub.h
@@ -1,14 +1,15 @@
-// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// 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 for a device that receives input events.
-// This interface handles event messages defined in event.proto.
+// This interface handles some event messages defined in event.proto.
 
 #ifndef REMOTING_PROTOCOL_INPUT_STUB_H_
 #define REMOTING_PROTOCOL_INPUT_STUB_H_
 
 #include "base/basictypes.h"
+#include "remoting/protocol/clipboard_stub.h"
 
 namespace remoting {
 namespace protocol {
@@ -16,7 +17,10 @@ namespace protocol {
 class KeyEvent;
 class MouseEvent;
 
-class InputStub {
+// TODO(wez): Stop InputStub inheriting from ClipboardStub when
+// DesktopEnvironment has been refactored so that it can treat InputStub and
+// ClipboardStub separately.
+class InputStub : public ClipboardStub {
  public:
   InputStub() {}
   virtual ~InputStub() {}