[Chromoting] Let the Windows IT2Me host send clipboard events to the client.

remoting/host/client_session.cc

Index: remoting/host/client_session.cc
diff --git a/remoting/host/client_session.cc b/remoting/host/client_session.cc
index 86a6753d3e55d57c65c506065572b40d4e6b8190..c922b770da803ce5281ca556caa6ef2cfe89a1e9 100644
--- a/remoting/host/client_session.cc
+++ b/remoting/host/client_session.cc
@@ -27,6 +27,7 @@ ClientSession::ClientSession(
       input_tracker_(host_event_stub_),
       remote_input_filter_(&input_tracker_),
       mouse_input_filter_(&remote_input_filter_),
+      client_clipboard_factory_(clipboard_echo_filter_.client_filter()),
       capturer_(capturer) {
   connection_->SetEventHandler(this);
 
@@ -164,4 +165,14 @@ void ClientSession::SetDisableInputs(bool disable_inputs) {
   }
 }
 
+scoped_ptr<protocol::ClipboardThreadProxy>
+ClientSession::CreateClipboardProxy() {
+  DCHECK(CalledOnValidThread());
+
+  return scoped_ptr<protocol::ClipboardThreadProxy>(
+      new protocol::ClipboardThreadProxy(
+          client_clipboard_factory_.GetWeakPtr(),
+          base::MessageLoopProxy::current()));
+}
+
 }  // namespace remoting