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Test Info:

<!DOCTYPE html>
<html class="reftest-wait">
<body>
<iframe id="foo" srcdoc="<body bgcolor='red'>FAIL</body>"></iframe>
<script type="text/javascript">
// Globals
var foo = document.getElementById('foo');
var win = foo.contentWindow;
// Start the chain of execution when iframe's window loads
win.onload = iframeWindowLoaded;
function iframeWindowLoaded() {
setTimeout("tweak()", 0);
}
function tweak() {
win.location ="data:text/html,<body bgcolor='lime'>PASS</body>";
foo.onload = snapshot;
}
function snapshot() {
document.documentElement.className = '';
}
</script>
</body>
</html>