Bug 1638121 [wpt PR 23614] - De-flaky pointerlock/pointerevent_movementxy.html, a=testonly

Automatic update from web-platform-tests
De-flaky pointerlock/pointerevent_movementxy.html

Because of Linux memory leak, pointerevent wpt tests
pointerlock/pointerevent_movementxy.html is flaky, we should finish the
test in the actions promise's callback to guarantee the actions are all
executed before the test finishes to avoid memory leak.

Bug: 998948
Change-Id: I483ea75e5081faedb5c59296d7c5d4f40b3f3880
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2200154
Reviewed-by: Navid Zolghadr <nzolghadr@chromium.org>
Commit-Queue: Lan Wei <lanwei@chromium.org>
Cr-Commit-Position: refs/heads/master@{#769399}

--

wpt-commits: 71f24a0e457c86fba453e234d4de5aa635fb2d88
wpt-pr: 23614

testing/web-platform/tests/pointerevents/pointerlock/pointerevent_movementxy.html

@@ -40,6 +40,9 @@
             var expectedPointerId = NaN;
             var lastScreenX = null;
             var lastScreenY = null;
+            var actionsPromiseMouse;
+            var actionsPromiseTouch;
+            var actionsPromisePen;
 
             function resetTestState() {
                 lastScreenX = null;
@@ -111,15 +114,26 @@
                   lastScreenY = event.screenY;
                 });
                 on_event(document.querySelector('#box2'), 'pointerup', function(event) {
-                  test_pointerEvent.done();
+                  // Make sure the test finishes after all the input actions are completed.
+                  if (expectedPointerType == "mouse") {
+                    actionsPromiseTouch = actionsPromiseMouse.then(function(){
+                      test_pointerEvent.done();
+                      return injectInput("touch");
+                    });
+                  } else if (expectedPointerType == "touch") {
+                    actionsPromisePen = actionsPromiseTouch.then(function(){
+                      test_pointerEvent.done();
+                      return injectInput("pen");
+                    });
+                  } else {
+                    actionsPromisePen.then( () => {
+                      test_pointerEvent.done();
+                    });
+                  }
                 });
 
-                // Inject input
-                injectInput("mouse").then(function(){
-                  return injectInput("touch")
-                }).then(function() {
-                  return injectInput("pen")
-                })
+                // Inject mouse input
+                actionsPromiseMouse = injectInput("mouse");
             }
 
         </script>