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chromium/content/test/data/accessibility/aria/aria-any-unignored.html 

<!DOCTYPE html>
<!-- Presence of any ARIA attribute should cause object to be unignored -->
<html>
<body>
  <p>Hi <span>ignored span</span></p>
  <p>Hi <span aria-nonsense>unignored span</span></p>
</body>
</html>