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chromium/content/test/data/accessibility/aria/hidden-described-by.html 

<!--
@UIA-WIN-ALLOW:Descr*
@BLINK-ALLOW:descr*
@WIN-ALLOW:descr*
-->
<!DOCTYPE html>
<html>
<style>
  .hide {
    visibility: hidden;
  }
  .visible {
    visibility: visible;
  }
</style>
<body>
  <div>
    <span class="hide" aria-label="span-A1">
      <span aria-label="span-A2" id="a2"></span>
      <span class="visible" aria-label="span-A3" aria-describedby="a4">
        <span class="hide" aria-label="span-A4" id="a4"></span>
      </span>
    </span>

    <span aria-label="span-B" aria-describedby="a2"></span>
    <span aria-label="span-C"></span>
  </div>
</body>
</html>