LayoutTests/imported/blink/fast/dom/custom/resources/empty-custom-body.html - WebKit - Git at Google

 <!DOCTYPE html>
 <script>
 var proto = Object.create(HTMLBodyElement.prototype);
 document.registerElement('x-body', {prototype: proto, extends: 'body'});
 </script>

 <body id="thebody" is="x-body">
 </body>
	<!DOCTYPE html>
	<script>
	var proto = Object.create(HTMLBodyElement.prototype);
	document.registerElement('x-body', {prototype: proto, extends: 'body'});
	</script>

	<body id="thebody" is="x-body">
	</body>