third_party/WebKit/LayoutTests/animations/timing/delay-timer-cancel-bug.html

<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<div id="target"></div>
<script>
var asyncHandle = async_test('Delayed animations are unaffected by on demand timeline updates.');
target.animate(null, {delay: 100}).onfinish = () => asyncHandle.done();
requestAnimationFrame(() => {
  requestAnimationFrame(() => {
    setTimeout(() => {
      // Force layout tree update which forces an on demand timing update.
      target.offsetTop;
    }, 0);
  });
});
</script>