third_party/web_platform_tests/custom-elements/resources/import-master-async.html - cobalt - Git at Google

 <!DOCTYPE html>
 <html>
     <head>
         <title>Import Master Document (asynchronous)</title>
         <link rel="import" href="import.html" async>
     </head>
     <body>
         <p>Master document body</p>
     </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<title>Import Master Document (asynchronous)</title>
	<link rel="import" href="import.html" async>
	</head>
	<body>
	<p>Master document body</p>
	</body>
	</html>