LayoutTests/fast/frames/hidpi-position-iframe-on-device-pixel.html - WebKit - Git at Google

 <!DOCTYPE html>
 <html>
 <head>
 <title>This tests that iframe can be positioned on odd device pixels.</title>
 <style>
   div {
     border: solid 0.5px green;
     position: fixed;
   }

   iframe {
      border: solid 0.5px red;
   }
 </style>
 </head>
 <body>
 <p id="container"></p>
 <script>
   var container = document.getElementById("container");
   adjustment = 0.1;
   w = 14; h = 14;
   for (i = 0; i < 20; ++i) {
     adjustment+=0.1;
     for (j = 0; j < 15; ++j) {
       var e = document.createElement("div");
       e.style.top = ((w + 1) * i + j * adjustment) + "px";
       e.style.left = ((w + 1) * j + i * adjustment) + "px";
       e.style.width = w + "px";
       e.style.height = h + "px";

       var iframe = document.createElement("iframe");
       iframe.style.width = (w - 1) + "px";
       iframe.style.height = (h - 1) + "px";

       e.appendChild(iframe);
       container.appendChild(e);
       w+=0.1;
       h+=0.1;
     }
   }
 </script>
 </body>
 </html>
	<!DOCTYPE html>
	<html>
	<head>
	<title>This tests that iframe can be positioned on odd device pixels.</title>
	<style>
	div {
	border: solid 0.5px green;
	position: fixed;
	}

	iframe {
	border: solid 0.5px red;
	}
	</style>
	</head>
	<body>
	<p id="container"></p>
	<script>
	var container = document.getElementById("container");
	adjustment = 0.1;
	w = 14; h = 14;
	for (i = 0; i < 20; ++i) {
	adjustment+=0.1;
	for (j = 0; j < 15; ++j) {
	var e = document.createElement("div");
	e.style.top = ((w + 1) * i + j * adjustment) + "px";
	e.style.left = ((w + 1) * j + i * adjustment) + "px";
	e.style.width = w + "px";
	e.style.height = h + "px";

	var iframe = document.createElement("iframe");
	iframe.style.width = (w - 1) + "px";
	iframe.style.height = (h - 1) + "px";

	e.appendChild(iframe);
	container.appendChild(e);
	w+=0.1;
	h+=0.1;
	}
	}
	</script>
	</body>
	</html>