<!DOCTYPE html>
<div id="pass" style="visibility: hidden">PASS</div>
<div id="fail" style="visibility: visible">FAIL</div>
<script>
if (window.testRunner) {
  testRunner.dumpAsText();
  testRunner.waitUntilDone();
}

requestAnimationFrame(function() {
  document.getElementById('pass').animate([{visibility: 'visible'}, {visibility: 'visible'}], {fill: 'forwards'});
  document.getElementById('fail').animate([{visibility: 'hidden'}, {visibility: 'hidden'}], {fill: 'forwards'});
  if (window.testRunner) {
    testRunner.notifyDone();
  }
});
</script>