LayoutTests/compositing/hidpi-image-backing-store.html - WebKit - Git at Google

 <!DOCTYPE HTML>
 <html>
 <head>
 <meta name="viewport" content="width=device-width, initial-scale=1">
 <script>

 if (window.testRunner) {
   testRunner.dumpAsText();
   testRunner.waitUntilDone();
 }

 function doTest() {
   document.getElementById('layers').innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_DEVICE_SCALE);
   testRunner.notifyDone();
 }

 window.addEventListener('load', doTest, false);
 </script>
 </head>

 <body>
 <p> Tests whether a compositing layer containing only an image uses a standard DPI backing store.</p>
 <img src="resources/simple_image.png" style="transform: translateZ(0px);"></img>
 <pre id="layers">Layer tree goes here in DRT</pre>
 </body>

 </html>
	<!DOCTYPE HTML>
	<html>
	<head>
	<meta name="viewport" content="width=device-width, initial-scale=1">
	<script>

	if (window.testRunner) {
	testRunner.dumpAsText();
	testRunner.waitUntilDone();
	}

	function doTest() {
	document.getElementById('layers').innerText = internals.layerTreeAsText(document, internals.LAYER_TREE_INCLUDES_DEVICE_SCALE);
	testRunner.notifyDone();
	}

	window.addEventListener('load', doTest, false);
	</script>
	</head>

	<body>
	<p> Tests whether a compositing layer containing only an image uses a standard DPI backing store.</p>
	<img src="resources/simple_image.png" style="transform: translateZ(0px);"></img>
	<pre id="layers">Layer tree goes here in DRT</pre>
	</body>

	</html>