LayoutTests/fast/dom/jsDevicePixelRatio.html - WebKit - Git at Google

 <html>
 <body>

 <script>
     document.write("The user interface scale factor is " + devicePixelRatio + ".");
 </script>

 </body>
 </html>
	<html>
	<body>

	<script>
	document.write("The user interface scale factor is " + devicePixelRatio + ".");
	</script>

	</body>
	</html>