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chromium
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chromium/third_party/blink/web_tests/fast/events/resources/suspend-subframe-2.html 

<!DOCTYPE html>
<html>
<head>
	<script>
	onpagehide = function() {
	  window.top.document.getElementById('a-frame').contentWindow.test();
	}
	</script>
</head>
<body>
I am subframe-2.html
</body>
</html>