LayoutTests/http/tests/misc/resources/nested-iframe-loading-another-iframe.html - WebKit - Git at Google

 <html>
 <head>
     <style>body { background-color: yellow; }</style>
 </head>
 <body>
     <div>
         <p>Load another level of nested iframe.</p>
     </div>
     <iframe src="3rd-level-iframe-with-blocking-resource.php"></iframe>
 </body>
 </html>
	<html>
	<head>
	<style>body { background-color: yellow; }</style>
	</head>
	<body>
	<div>
	<p>Load another level of nested iframe.</p>
	</div>
	<iframe src="3rd-level-iframe-with-blocking-resource.php"></iframe>
	</body>
	</html>