Codebase Browser
chromium
Go to App

chromium/content/test/data/accessibility/aria/presentational.html 

<html>
<body>
  <section>
    <h2>Heading <a href='#'>with link</a></h2>
    <h2 role="none">Presentational heading <a href='#'>with link</a></h2>
  </section>
</body>
</html>