LayoutTests/compositing/layer-creation/fixed-position-in-view-dynamic.html - WebKit - Git at Google

 <!DOCTYPE html>

 <html>
 <head>
   <style>
     .fixed {
       position: fixed;
       width: 10px;
       height: 10px;
       top: 100px;
       background-color: silver;
     }
   </style>

   <script type="text/javascript">
     if (window.testRunner && window.internals) {
       testRunner.dumpAsText();
       internals.settings.setAcceleratedCompositingForFixedPositionEnabled(true);

       addEventListener("load", function() {
         var fixed = document.createElement("div");
         document.body.appendChild(fixed);
         document.body.offsetHeight;
         fixed.className = "fixed";
         var synchronousScrollingReasons = internals.synchronousScrollingReasons();
         document.getElementById("result").innerText = !synchronousScrollingReasons ? "PASS" : "FAIL: " + synchronousScrollingReasons;
       }, false);
     }
   </script>
 </head>

 <body>
   <pre id="result"></pre>
 </body>
 </html>
	<!DOCTYPE html>

	<html>
	<head>
	<style>
	.fixed {
	position: fixed;
	width: 10px;
	height: 10px;
	top: 100px;
	background-color: silver;
	}
	</style>

	<script type="text/javascript">
	if (window.testRunner && window.internals) {
	testRunner.dumpAsText();
	internals.settings.setAcceleratedCompositingForFixedPositionEnabled(true);

	addEventListener("load", function() {
	var fixed = document.createElement("div");
	document.body.appendChild(fixed);
	document.body.offsetHeight;
	fixed.className = "fixed";
	var synchronousScrollingReasons = internals.synchronousScrollingReasons();
	document.getElementById("result").innerText = !synchronousScrollingReasons ? "PASS" : "FAIL: " + synchronousScrollingReasons;
	}, false);
	}
	</script>
	</head>

	<body>
	<pre id="result"></pre>
	</body>
	</html>