Set the unique_event_id when converting from TouchEvent to WebTouchEvent

ui/events/gestures/gesture_recognizer.h

Index: ui/events/gestures/gesture_recognizer.h
diff --git a/ui/events/gestures/gesture_recognizer.h b/ui/events/gestures/gesture_recognizer.h
index 325efa21c7838e372139c3301382ee0df11780f1..997f95c9955db4107e7518b8010bebf092a6c0a5 100644
--- a/ui/events/gestures/gesture_recognizer.h
+++ b/ui/events/gestures/gesture_recognizer.h
@@ -39,7 +39,7 @@ class EVENTS_EXPORT GestureRecognizer {
 
   // Returns a list of zero or more GestureEvents. The caller is responsible for
   // freeing the returned events. Acks the last gesture packet in the queue.
-  virtual Gestures* AckSyncTouchEvent(const uint64 unique_event_id,
+  virtual Gestures* AckSyncTouchEvent(const uint32 unique_touch_event_id,
                                       ui::EventResult result,
                                       GestureConsumer* consumer) = 0;