<html class="reftest-wait">
<head>
    <script>
      const doc = new Document();
      const video = document.createElementNS('http://www.w3.org/1999/xhtml', 'video');
      const source = new MediaSource();

      navigator.requestMediaKeySystemAccess('org.w3.clearkey', [{ '': [{ '': '' }] }])
        .then(keySystemAccess => {
          return keySystemAccess.createMediaKeys();
        }).then(_ => {
        video.src = URL.createObjectURL(source);
        source.addEventListener('sourceopen', () => {
          doc.adoptNode(video);
        });
      });

      navigator.requestMediaKeySystemAccess('org.w3.clearkey', [{ '': [{ '': '' }] }])
        .then(keySystemAccess => {
          return keySystemAccess.createMediaKeys();
        }).then(mediaKeys => {
        return video.setMediaKeys(mediaKeys);
      }).then(() => {
        video.src = URL.createObjectURL(source);
        document.documentElement.removeAttribute("class");
      }).catch(e => {
        // Catch JS errors caused by raciness in the test. So long as we're
        // not crashing we're good.
        document.documentElement.removeAttribute("class");
      });
    </script>
</head>
</html>
