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chromium/content/test/data/accessibility/css/font-family.html 

<!--
@BLINK-ALLOW:fontFamily=*
@WIN-ALLOW:font-family:*
@WIN-ALLOW:offset:*
@AURALINUX-ALLOW:family-name=*
@AURALINUX-ALLOW:offset=*
-->
<!DOCTYPE html>
<html>
  <body style="font-family: serif">
    <nav>
      <p style="font-family: monospace">Monospace</p>
      <p role="presentation" style="font-family: sans-serif">Sans serif</p>
    </nav>
  </body>
</html>