third_party/blink/web_tests/external/wpt/navigation-timing/resources/secure-connection-interim.html - chromium/src - Git at Google

 <!doctype html>
 <script>
   window.addEventListener("message", e => {
     window.top.postMessage(e.data, "*");
   });
 </script>
 <iframe src="secure-connection-test.html">
	<!doctype html>
	<script>
	window.addEventListener("message", e => {
	window.top.postMessage(e.data, "*");
	});
	</script>
	<iframe src="secure-connection-test.html">