<!DOCTYPE html>
<ol contenteditable oninput="document.body.innerHTML = observerRan ? 'FAILED' : 'PASSED'; if (window.testRunner) testRunner.notifyDone()">
    <li>Press enter
</ol>
<script>
    if (window.testRunner) {
        testRunner.dumpAsText();
        testRunner.waitUntilDone();
    }

    var list = document.querySelector('ol');
    var observerRan = false;
    var observer = new MutationObserver(function() { observerRan = true; });
    observer.observe(list, {childList: true, characterData: true});
    list.focus();
    if (window.eventSender)
        eventSender.scheduleAsynchronousKeyDown('\n');
</script>