LayoutTests/compositing/geometry/ancestor-overflow-change.html - WebKit - Git at Google

 <!DOCTYPE html>

 <html>
 <head>
   <style type="text/css" media="screen">
     #container {
       position: relative;
       height: 50px;
       width: 100px;
       outline: 2px solid black;
       overflow: hidden;
     }

     #container.changed {
       overflow: visible;
       height: 100px;
     }

     .box {
       width: 100px;
       height: 100px;
       background-color: green;
       -webkit-transform: translateZ(1px);
     }

     #indicator {
       position: absolute;
       width: 100px;
       height: 100px;
       background-color: red;
     }

     #layers {
       opacity: 0; /* Hide from pixel results */
     }
   </style>
   <script type="text/javascript" charset="utf-8">
     if (window.testRunner) {
       testRunner.dumpAsText(true);
       testRunner.waitUntilDone();
     }

     function changeOverflow()
     {
       document.getElementById('container').className = 'changed';

       if (window.testRunner)
         document.getElementById('layers').innerText = window.internals.layerTreeAsText(document);

       if (window.testRunner)
         testRunner.notifyDone();
     }

     window.addEventListener('load', function() {
       window.setTimeout(changeOverflow, 0);
     }, false);
   </script>
 </head>
 <body>

   <div id="indicator"></div>
   <div id="container">
     <div class="box"></div>
   </div>

 <pre id="layers">Layer tree goes here in DRT</pre>
 </body>
 </html>
	<!DOCTYPE html>

	<html>
	<head>
	<style type="text/css" media="screen">
	#container {
	position: relative;
	height: 50px;
	width: 100px;
	outline: 2px solid black;
	overflow: hidden;
	}

	#container.changed {
	overflow: visible;
	height: 100px;
	}

	.box {
	width: 100px;
	height: 100px;
	background-color: green;
	-webkit-transform: translateZ(1px);
	}

	#indicator {
	position: absolute;
	width: 100px;
	height: 100px;
	background-color: red;
	}

	#layers {
	opacity: 0; /* Hide from pixel results */
	}
	</style>
	<script type="text/javascript" charset="utf-8">
	if (window.testRunner) {
	testRunner.dumpAsText(true);
	testRunner.waitUntilDone();
	}

	function changeOverflow()
	{
	document.getElementById('container').className = 'changed';

	if (window.testRunner)
	document.getElementById('layers').innerText = window.internals.layerTreeAsText(document);

	if (window.testRunner)
	testRunner.notifyDone();
	}

	window.addEventListener('load', function() {
	window.setTimeout(changeOverflow, 0);
	}, false);
	</script>
	</head>
	<body>

	<div id="indicator"></div>
	<div id="container">
	<div class="box"></div>
	</div>

	<pre id="layers">Layer tree goes here in DRT</pre>
	</body>
	</html>