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

remoting/host/client_session.h

Index: remoting/host/client_session.h
diff --git a/remoting/host/client_session.h b/remoting/host/client_session.h
index 084d153a2de2acaa64684c73dc115e6ed6375d30..7811de626f1ea93f2b66761c1f4352cea8ce768d 100644
--- a/remoting/host/client_session.h
+++ b/remoting/host/client_session.h
@@ -10,6 +10,7 @@
 #include "base/time.h"
 #include "base/threading/non_thread_safe.h"
 #include "remoting/host/remote_input_filter.h"
+#include "remoting/protocol/clipboard_duplicate_filter.h"
 #include "remoting/protocol/clipboard_stub.h"
 #include "remoting/protocol/connection_to_client.h"
 #include "remoting/protocol/host_event_stub.h"
@@ -145,6 +146,9 @@ class ClientSession : public protocol::HostEventStub,
   // Filter used to disable inputs when we're not authenticated.
   protocol::InputFilter auth_input_filter_;
 
+  // Filter to used to stop duplicate events being sent to the client.
+  protocol::ClipboardDuplicateFilter clipboard_duplicate_filter_;
+
   // Capturer, used to determine current screen size for ensuring injected
   // mouse events fall within the screen area.
   // TODO(lambroslambrou): Move floor-control logic, and clamping to screen