LayoutTests/http/tests/misc/resources/before-unload-in-subframe-child.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <body onbeforeunload="top.fired(window); return null;">
 Child loaded.
 <script>

 if (top.loaded)
     top.loaded();

 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<body onbeforeunload="top.fired(window); return null;">
	Child loaded.
	<script>

	if (top.loaded)
	top.loaded();

	</script>
	</body>
	</html>