<!DOCTYPE html>
<html>
<head>
<script>
if (window.testRunner)
    testRunner.setImagesAllowed(true);
</script>
<style>
#target {
    background: url(data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAABkAAAAZCAIAAABLixI0AAAAJklEQVR4nGJg+M9ANTRq1qhZo2aNmjVq1qhZo2ZhIAAAAAD//wMA1XBuro0zsokAAAAASUVORK5CYII=) center no-repeat;
    width: 32px;
    height: 32px;
    position: absolute;
    left: 0px;
    top: 0px;
}
</style>
</head>
<body>
  <div id="target"></div>
</body>
</html>