css/compositing/root-element-background-margin-opacity-ref.html - external/github.com/web-platform-tests/wpt - Git at Google

 <!DOCTYPE html>
 <div style="position: absolute; top: 100px; left: 100px; width: 100px; height: 100px;
             background: green; opacity: 0.5"></div>
	<!DOCTYPE html>
	<div style="position: absolute; top: 100px; left: 100px; width: 100px; height: 100px;
	background: green; opacity: 0.5"></div>