scroll-fixed-transformed-element.html

<!DOCTYPE html>
<html>
<head>
  <style>
    iframe {
      width: 300px;
      height: 300px;
      position: absolute;
      border: none;
      background-color: red;
    }
  </style>
</head>
<body>
  <!-- This test reproduces https://bugs.webkit.org/show_bug.cgi?id=84979.
       In this bug, clipRects that were supposed to be "infinite" were being scrolled,
       causing them to no longer be considered infinite. As a result, fixed-position
       layers with transformed elements would have problems.

       In this layout test, the fixed-position green box should fill the iframe, thus
       hiding the red background.
    -->
  <iframe id="frame" src="resources/fixed-position-transformed-subframe.html"></iframe>
</body>
</html>

chromium/third_party/blink/web_tests/compositing/iframes/scroll-fixed-transformed-element.html