chromium/src/third_party/blink/web_tests/accessibility/aom-crash.html

<script src="../resources/testharness.js"></script>
<script src="../resources/testharnessreport.js"></script>

<div id="atomic">

<script>
test(function() {
    var parent = document.getElementById("atomic");
    var accessibleNode = new AccessibleNode();
    parent.accessibleNode.appendChild(accessibleNode);
    var axParent = accessibilityController.accessibleElementById("atomic");
    var axNode = axParent.childAtIndex(0);
    accessibleNode.atomic = true;
});
</script>