third_party/blink/web_tests/fast/dynamic/transform-removed-from-absolute-with-fixed-children.html - chromium/src - Git at Google

 <!DOCTYPE html>
 <p>The word "PASS" should be seen in the bottom left corner of the viewport, and there should be no crash or assertion failure.</p>
 <div style="position:relative;">
     <div id="elm" style="transform:rotate(3deg); position:absolute;">
         <div id="child" style="position:fixed; bottom:0;">PASS</div>
     </div>
 </div>
 <script>
     document.body.offsetTop;
     document.getElementById("elm").style.transform = "none";
     document.body.offsetTop;
     document.getElementById("child").style.width = "50%";
 </script>
	<!DOCTYPE html>
	<p>The word "PASS" should be seen in the bottom left corner of the viewport, and there should be no crash or assertion failure.</p>
	<div style="position:relative;">
	<div id="elm" style="transform:rotate(3deg); position:absolute;">
	<div id="child" style="position:fixed; bottom:0;">PASS</div>
	</div>
	</div>
	<script>
	document.body.offsetTop;
	document.getElementById("elm").style.transform = "none";
	document.body.offsetTop;
	document.getElementById("child").style.width = "50%";
	</script>