third_party/blink/web_tests/compositing/child-transform-layer-with-foreground-layer-expected.html - chromium/src - Git at Google

 <!DOCTYPE HTML>
 <div style="width: 100px; height: 100px; opacity: 0.8; -webkit-box-shadow: 0px 0px 5px 5px #fff;">
   <div style="position: relative; z-index: -1; width: 10px; height: 10px; background: blue"></div>
   <div style="width: 40px; height: 40px; background: orange;"></div>
   <div style="width: 40px; height: 40px; background: green; will-change: transform;"></div>
 </div>
	<!DOCTYPE HTML>
	<div style="width: 100px; height: 100px; opacity: 0.8; -webkit-box-shadow: 0px 0px 5px 5px #fff;">
	<div style="position: relative; z-index: -1; width: 10px; height: 10px; background: blue"></div>
	<div style="width: 40px; height: 40px; background: orange;"></div>
	<div style="width: 40px; height: 40px; background: green; will-change: transform;"></div>
	</div>