Add the actual location coordinates to the touch cancel event

ui/events/event.h

Index: ui/events/event.h
diff --git a/ui/events/event.h b/ui/events/event.h
index b2f94569944a2511f7f4b7d90afb07fcbd6b1cd5..7257f625f40299b32510fb80850b4259db5f00c0 100644
--- a/ui/events/event.h
+++ b/ui/events/event.h
@@ -187,6 +187,11 @@ class EVENTS_EXPORT Event {
     return type_ == ET_MOUSEWHEEL;
   }
 
+  bool IsLocatedEvent() const {
+    return IsMouseEvent() || IsScrollEvent() || IsTouchEvent() ||
+           IsGestureEvent();
+  }
+
   // Convenience methods to cast |this| to a GestureEvent. IsGestureEvent()
   // must be true as a precondition to calling these methods.
   GestureEvent* AsGestureEvent();