src/third_party/web_platform_tests/conformance-checkers/html-aria/roles-properties-required/roles-properties-required-checkbox-aria-checked-mixed.html - cobalt - Git at Google

 <!DOCTYPE html>
 <html>
    <head>
       <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
       <title>&lt;div&gt; with role checkbox; required state or property "aria-checked" value of "mixed"</title>
    </head>
    <body>
       <div id="test" role="checkbox" aria-checked="mixed">Placeholder content</div>
       <div id="obj1">obj1</div>
       <div id="obj2">obj2</div>
    </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
	<title><div> with role checkbox; required state or property "aria-checked" value of "mixed"</title>
	</head>
	<body>
	<div id="test" role="checkbox" aria-checked="mixed">Placeholder content</div>
	<div id="obj1">obj1</div>
	<div id="obj2">obj2</div>
	</body>
	</html>