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

remoting/host/remote_input_filter.cc

Index: remoting/host/remote_input_filter.cc
diff --git a/remoting/host/remote_input_filter.cc b/remoting/host/remote_input_filter.cc
index 2b2833458f3e025576236c2feb0c42c47f717fdf..3201431f49423f0e9146ac59b77efd8b423693a9 100644
--- a/remoting/host/remote_input_filter.cc
+++ b/remoting/host/remote_input_filter.cc
@@ -95,6 +95,12 @@ void RemoteInputFilter::InjectMouseEvent(const protocol::MouseEvent& event) {
   event_tracker_->InjectMouseEvent(event);
 }
 
+void RemoteInputFilter::InjectTouchEvent(const protocol::TouchEvent& event) {
+  if (ShouldIgnoreInput())
+    return;
+  event_tracker_->InjectTouchEvent(event);
+}
+
 bool RemoteInputFilter::ShouldIgnoreInput() const {
   // Ignore remote events if the local mouse moved recently.
   int64 millis =