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chromium/third_party/blink/web_tests/compositing/geometry/horizontal-scroll-composited.html 

<html>
<head>
    <title>Horizontal scroll test for composited elements</title>
    <script type="text/javascript" charset="utf-8">
    if (window.testRunner)
        testRunner.waitUntilDone();
    </script>
</head>
<body style="width: 600px">
<div style="will-change: transform; width: 1000px; height: 800px; border-style: solid; border-color: Red; border-width: 3px; background-image: url(../resources/apple.jpg); background-repeat:repeat"></div>
<script type="text/javascript" charset="utf-8">
      window.scrollBy(300, 0);
      if (window.testRunner)
        testRunner.notifyDone();
</script>
</body>
</html>