Add ClientDimensions message to control channel.

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 b6e8250d761319adfb89d3e4b6ba864c5f4242fe..12bc795301757ad093611e7e74f97d3bb99ab2d9 100644
--- a/remoting/protocol/client_control_dispatcher.cc
+++ b/remoting/protocol/client_control_dispatcher.cc
@@ -43,6 +43,13 @@ void ClientControlDispatcher::InjectClipboardEvent(
   writer_->Write(SerializeAndFrameMessage(message), base::Closure());
 }
 
+void ClientControlDispatcher::NotifyClientDimensions(
+    const ClientDimensions& dimensions) {
+  ControlMessage message;
+  message.mutable_client_dimensions()->CopyFrom(dimensions);
+  writer_->Write(SerializeAndFrameMessage(message), base::Closure());
+}
+
 void ClientControlDispatcher::OnMessageReceived(
     scoped_ptr<ControlMessage> message, const base::Closure& done_task) {
   DCHECK(client_stub_);