[Chromoting] Add a filter that will stop the host sending unnecessary clipboard events to the clien…

remoting/protocol/host_control_dispatcher.h

Index: remoting/protocol/host_control_dispatcher.h
diff --git a/remoting/protocol/host_control_dispatcher.h b/remoting/protocol/host_control_dispatcher.h
index 0e36ce415a184d239c77d5fad312dbe8ea10da45..8f0473b057cb9eabdfbc038630a9b3b6175cc2c6 100644
--- a/remoting/protocol/host_control_dispatcher.h
+++ b/remoting/protocol/host_control_dispatcher.h
@@ -24,10 +24,9 @@ class HostStub;
 class Session;
 
 // HostControlDispatcher dispatches incoming messages on the control
-// channel to HostStub or ClipboardStub, and also implements ClientStub and
-// ClipboardStub for outgoing messages.
-class HostControlDispatcher : public ChannelDispatcherBase, public ClientStub,
-                              public ClipboardStub {
+// channel to HostStub or ClipboardStub, and also implements ClientStub for
+// outgoing messages.
+class HostControlDispatcher : public ChannelDispatcherBase, public ClientStub {
  public:
   HostControlDispatcher();
   virtual ~HostControlDispatcher();