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

<!DOCTYPE html>
<!--
@MAC-ALLOW:AXARIAAtomic=*
@WIN-ALLOW:atomic:*
@WIN-ALLOW:container-atomic:*
@BLINK-ALLOW:liveAtomic=true
@BLINK-ALLOW:containerLiveAtomic=true
@AURALINUX-ALLOW:atomic:*
@AURALINUX-ALLOW:container-atomic:*
@AURALINUX-ALLOW:live:*
-->
<html>
<body>
  <p id="ariaatomicfalse" role="log" aria-live="polite" aria-atomic="false" tabindex="0"> This test is for aria-atomic="false" </p>
  <p id="ariaatomictrue" role="log" aria-live="polite" aria-atomic="true" tabindex="1"> This test is for aria-atomic="true" </p>

  <!-- Roles of "alert" and "status" have implicit aria-atomic of true. -->
  <p id="alert" role="alert" tabindex="2">This test is for alert.</p>
  <p id="status" role="status" tabindex="3">This test is for status.</p>
</body>
</html>