Add notifyClientDimensions API to the Chromoting Client plugin.

remoting/protocol/connection_to_host.cc

Index: remoting/protocol/connection_to_host.cc
diff --git a/remoting/protocol/connection_to_host.cc b/remoting/protocol/connection_to_host.cc
index 0a568f69248d50f393fb9eccf4bb5e671eeae075..7ed07a43c21c562f13e6503adf76de3b87044992 100644
--- a/remoting/protocol/connection_to_host.cc
+++ b/remoting/protocol/connection_to_host.cc
@@ -49,6 +49,11 @@ ClipboardStub* ConnectionToHost::clipboard_stub() {
   return &clipboard_forwarder_;
 }
 
+HostStub* ConnectionToHost::host_stub() {
+  // TODO(wez): Add a HostFilter class, equivalent to input filter.
+  return control_dispatcher_.get();
+}
+
 InputStub* ConnectionToHost::input_stub() {
   return &event_forwarder_;
 }