Bug 1690906: Fix Event-dispatch-redispatch.html to pass on macOS with non-native theme enabled. r=emilio

Differential Revision: https://phabricator.services.mozilla.com/D104110

testing/web-platform/meta/dom/events/Event-dispatch-redispatch.html.ini

@@ -1,5 +0,0 @@
-[Event-dispatch-redispatch.html]
-  [Redispatching mouseup event whose default action dispatches a click event]
-    expected:
-      if (os == "linux") and not non_native_theme: FAIL
-      if os == "win": FAIL

testing/web-platform/tests/dom/events/Event-dispatch-redispatch.html

@@ -105,13 +105,7 @@ async function testMouseUpAndClickEvent() {
   await waitForLoad;
   let bounds = buttonElement.getBoundingClientRect();
   test(() => { assert_true(true); }, `Synthesizing click on button...`);
-  new test_driver.Actions()
-      .pointerMove(Math.floor(bounds.width / 5),
-                   Math.floor(bounds.height / 2),
-                   {origin: buttonElement})
-      .pointerDown({button: test_driver.Actions.prototype.ButtonType.LEFT})
-      .pointerUp({button: test_driver.Actions.prototype.ButtonType.LEFT})
-      .send()
+  new test_driver.click(buttonElement)
       .then(() => {
         test_mouseup_redispatching.step(() => {
           assert_not_equals(clickEvent, undefined, "mouseup and click events should've been fired");