Make sure PointerEvents's isPrimary set correctly for stylus

third_party/WebKit/LayoutTests/external/wpt_automation/pointerevents/pointerevent_pointerleave_pen-manual-automation.js

 importAutomationScript('/pointerevents/pointerevent_common_input.js');
 
 function inject_input() {
   return penMoveIntoTarget('#target0').then(function() {
     penMoveToDocument();
+  }).then(function() {

[Navid Zolghadr, 2017/04/27 16:04:34]

This one does nothing anyway as we are skipping this test due to the lack of
"screen leave" action. But having it here doesn't hurt.

[lanwei, 2017/04/27 20:18:20]

Yes, this is just remind me that I need to change this test, moving the pen back
and forth.

+    return penMoveIntoTarget('#target0');
+  }).then(function() {
+    return penMoveToDocument();
   });
-}
-
+}