third_party/WebKit/LayoutTests/fast/dom/shadow/shadowdom-for-object-with-content.html - chromium/src - Git at Google

 <!DOCTYPE html>
 <body>
 <object type="invalid-type" data="invalid-data">
 <div>Fallback</div> <span>content</span>
 </object>

 <script>
 document.querySelector('object').createShadowRoot().innerHTML = 'Author Shadow <content select="span"></content>';
 </script>
 </body>
	<!DOCTYPE html>
	<body>
	<object type="invalid-type" data="invalid-data">
	<div>Fallback</div> <span>content</span>
	</object>

	<script>
	document.querySelector('object').createShadowRoot().innerHTML = 'Author Shadow <content select="span"></content>';
	</script>
	</body>