third_party/WebKit/LayoutTests/http/tests/cookies/resources/post-cookies-onmessage.php - chromium/src - Git at Google

 <!doctype html>
 <script>

 var from_http = <?php
 echo json_encode($_COOKIE);
 ?>;

 window.addEventListener("message", e => {
     e.source.postMessage({
         'http': from_http,
         'document': document.cookie
     }, "*");
 });
 </script>
	<!doctype html>
	<script>

	var from_http = <?php
	echo json_encode($_COOKIE);
	?>;

	window.addEventListener("message", e => {
	e.source.postMessage({
	'http': from_http,
	'document': document.cookie
	}, "*");
	});
	</script>