LayoutTests/http/tests/navigation/resources/frame-pagehide-starts-load.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <body>
 <script>
 window.addEventListener("pagehide", function(event) {
     var xhr = new XMLHttpRequest();
     xhr.open("GET", "resources/slow-resource.pl?delay=3000", true);
     xhr.send();
 }, false);
 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<body>
	<script>
	window.addEventListener("pagehide", function(event) {
	var xhr = new XMLHttpRequest();
	xhr.open("GET", "resources/slow-resource.pl?delay=3000", true);
	xhr.send();
	}, false);
	</script>
	</body>
	</html>