src/third_party/web_platform_tests/conformance-checkers/html/elements/keygen/challenge-isvalid.html - cobalt - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 <meta charset=utf-8>
 <title>keygen with "challenge" attribute</title>
 </head>
 <body>
 <keygen challenge="123456">
 <keygen challenge=""> <!-- empty challenge -->
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta charset=utf-8>
	<title>keygen with "challenge" attribute</title>
	</head>
	<body>
	<keygen challenge="123456">
	<keygen challenge=""> <!-- empty challenge -->
	</body>
	</html>