composited-iframe-alignment.html | Explore in Territory

<!DOCTYPE html>
<html>
<head>
  <title>Composited iframe test</title>
  <style type="text/css" media="screen">
    iframe {
        position: absolute;
        left:100px;
        top:100px;
        border: 20px solid black;
        padding: 0;
        height: 300px;
        width: 400px;
        -webkit-box-shadow: 0 0 20px black;
    }
  </style>
</head>
<body>
    Simple test of composited iframe content. There should be a blue box with a gray background
    inside the black border. The gray background should fit perfectly within the block border
    with no gaps.
    <br><br>
    <iframe id="parent-iframe" src="resources/composited-subframe.html"></iframe>
</body>
</html>

chromium/third_party/blink/web_tests/compositing/iframes/composited-iframe-alignment.html