<!DOCTYPE html>
<html>
<head>
<script>
if (window.testRunner) {
    testRunner.dumpAsText();
    window.internals.settings.setShadowDOMEnabled(false);
}
</script>
</head>
<body>
<summary>
  <content></content>
</summary>
<summary>
  <shadow></shadow>
</summary>
<div>PASS unless crash</div>
</head>
</html>