<!DOCTYPE html>
<html>

<div id="host1"><div>Host Child</div></div>

<script>
if (window.testRunner)
    testRunner.waitUntilDone();

var shadowRoot1 = host1.createShadowRoot();
shadowRoot1.innerHTML = '<div id="host2">Oldest ShadowRoot Child</div>';

var shadowRoot2 = host1.createShadowRoot();
shadowRoot2.innerHTML = '<div id="host3"><shadow></shadow><content></content><div>Youngest ShadowRoot Child</div></div>';

var host3 = shadowRoot2.getElementById('host3');
var shadowRoot3 = host3.createShadowRoot();
shadowRoot3.innerHTML = '<content select="div"></content>';

setTimeout(function() {
    shadowRoot1.innerHTML = '<div id="host2">Updated Oldest ShadowRoot Child</div><div>Added Oldest ShadowRoot Child</div>';
    if (window.testRunner)
        testRunner.notifyDone();
}, 0);
</script>

</html>