Add touch events to the protocol, the stub layer, and to the client plugin.

remoting/protocol/client_event_dispatcher.cc

Index: remoting/protocol/client_event_dispatcher.cc
diff --git a/remoting/protocol/client_event_dispatcher.cc b/remoting/protocol/client_event_dispatcher.cc
index 89e4bcf8cbe14cf94c5085f06c8bc4e8baa1a5fb..43507468b8a4641b8c3ba5d96ffbd312201d8b1b 100644
--- a/remoting/protocol/client_event_dispatcher.cc
+++ b/remoting/protocol/client_event_dispatcher.cc
@@ -46,5 +46,12 @@ void ClientEventDispatcher::InjectMouseEvent(const MouseEvent& event) {
   writer()->Write(SerializeAndFrameMessage(message), base::Closure());
 }
 
+void ClientEventDispatcher::InjectTouchEvent(const TouchEvent& event) {
+  EventMessage message;
+  message.set_timestamp(base::Time::Now().ToInternalValue());
+  message.mutable_touch_event()->CopyFrom(event);
+  writer()->Write(SerializeAndFrameMessage(message), base::Closure());
+}
+
 }  // namespace protocol
 }  // namespace remoting