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chromium/content/test/data/accessibility/accname/name-text-labelledby-hidden-with-hidden-child.html 

<!--
@BLINK-DENY:description
-->
<!DOCTYPE html>
<html>
<body>
  <input id="test" aria-labelledby="t1">
  <div id="t1" style="visibility:hidden"><span style="visibility:hidden">foo</span><span>bar</span>baz</div>
</body>
</html>