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chromium/content/test/data/accessibility/aria/aria-marquee.html 

<!--
@MAC-ALLOW:AXRoleDescription
@MAC-ALLOW:AXARIALive
@WIN-ALLOW:xml-roles:*
@WIN-ALLOW:live*
@WIN-ALLOW:container*
@WIN-ALLOW:BUSY*
@BLINK-ALLOW:live*
@BLINK-ALLOW:container*
@AURALINUX-ALLOW:busy*
@AURALINUX-ALLOW:container*
@AURALINUX-ALLOW:live*
@AURALINUX-ALLOW:xml-roles:*
-->
<!DOCTYPE html>
<html>
  <body>
    <div tabindex=0 role="marquee" aria-live="off"></div>
    <div tabindex=1 role="marquee" aria-live="polite"></div>
    <div tabindex=2 role="marquee" aria-live="assertive"></div>
  </body>
</html>