Tools/TestWebKitAPI/Tests/WebKitCocoa/page-without-csp-iframe.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <body>
 <script nonce="a">
 window.webkit.messageHandlers.testHandler.postMessage("Subframe: A");
 </script>
 <script nonce="b">
 window.webkit.messageHandlers.testHandler.postMessage("Subframe: B");
 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<body>
	<script nonce="a">
	window.webkit.messageHandlers.testHandler.postMessage("Subframe: A");
	</script>
	<script nonce="b">
	window.webkit.messageHandlers.testHandler.postMessage("Subframe: B");
	</script>
	</body>
	</html>