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Test Info:

<!DOCTYPE HTML>
<html>
<!--
-->
<head>
<meta charset="utf-8">
<title>Test for Bug 1094930</title>
<script src="/tests/SimpleTest/SimpleTest.js"></script>
<link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
<iframe id="ifr"></iframe>
</head>
<body>
<p id="display"></p>
<script type="application/javascript">
SimpleTest.waitForExplicitFinish();
class XFoo extends frames[0].HTMLElement {
connectedCallback() {
ok(true, "connectedCallback was called");
SimpleTest.finish();
}
};
customElements.define.call(frames[0].customElements, "x-foo", XFoo);
frames[0].document.firstChild.appendChild(new XFoo());
</script>
</body>
</html>