Add VideoLayout message.

remoting/protocol/client_control_dispatcher.cc

Index: remoting/protocol/client_control_dispatcher.cc
diff --git a/remoting/protocol/client_control_dispatcher.cc b/remoting/protocol/client_control_dispatcher.cc
index e228b0a71b7347837388ec6b88f34fb88861d44a..78f836d9553dba64ee96b24c037579407357487f 100644
--- a/remoting/protocol/client_control_dispatcher.cc
+++ b/remoting/protocol/client_control_dispatcher.cc
@@ -132,6 +132,8 @@ void ClientControlDispatcher::OnIncomingMessage(
     client_stub_->SetPairingResponse(message->pairing_response());
   } else if (message->has_extension_message()) {
     client_stub_->DeliverHostMessage(message->extension_message());
+  } else if (message->has_video_layout()) {
+    client_stub_->SetVideoLayout(message->video_layout());
   } else {
     LOG(WARNING) << "Unknown control message received.";
   }