Codebase Browser
chromium
Go to App

chromium/third_party/blink/web_tests/media/controls/buttons-after-reset-expected.html 

<!DOCTYPE html>
<html>
<script src="../media-controls.js"></script>
<video controls width=400>
  <track kind=subtitles src=fake-en-sub.vtt srclang=en label=English>
  <track kind=subtitles src=fake-fr-sub.vtt srclang=fr label=French>
</video>
<script>
  var video = document.querySelector('video');
  enableTestMode(video);
  video.src = '../content/test.ogv';
</script>
</html>