window-open-insert-list-crash-iframe.html

<!DOCTYPE html>
<script>
document.addEventListener("DOMSubtreeModified",
    function () {
        document.designMode = "on";
        document.execCommand("SelectAll");
        window.stop();
        document.execCommand("InsertOrderedList", false);
        window.setTimeout(notifyFinish, 0);
    }, true);

window.onload = function () {
    document.open();
};

function notifyFinish()
{
    window.parent.postMessage("FINISH", "*");
}
</script>
<iframe>
</iframe><body class="class2">

chromium/third_party/blink/web_tests/dom/mutation-event-tests/editing/execCommand/resources/window-open-insert-list-crash-iframe.html