Include external touchscreen vid/pid in UMA hardware profile

ui/events/event_utils.h

Index: ui/events/event_utils.h
diff --git a/ui/events/event_utils.h b/ui/events/event_utils.h
index e67a74111d6da327d6e6105e6ff4c1cbdafed8e3..87c97029e6b443002caf3ad16862144524fda3d8 100644
--- a/ui/events/event_utils.h
+++ b/ui/events/event_utils.h
@@ -133,6 +133,9 @@ EVENTS_EXPORT bool IsNaturalScrollEnabled();
 // Returns whether natural scrolling should be used for touchpad.
 EVENTS_EXPORT bool ShouldDefaultToNaturalScroll();
 
+// Returns whether or not the internal display produces touch events.
+EVENTS_EXPORT bool InternalDisplaySupportsTouch();
+
 // Was this event generated by a touchpad device?
 // The caller is responsible for ensuring that this is a mouse/touchpad event
 // before calling this function.