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Test Info:

<!DOCTYPE html>
<html class="reftest-wait">
<head>
<script>
function boom()
{
var frame = document.createElement("iframe");
document.body.appendChild(frame);
var frameLoc = frame.contentWindow.location;
document.body.removeChild(frame)
frameLoc.origin;
document.documentElement.removeAttribute('class');
}
</script>
</head>
<body onload="boom();"></body>
</html>