chromium/third_party/blink/web_tests/paint/invalidation/scroll/fixed-move-after-keyboard-scroll.html

<html>
<head>
  <meta http-equiv="content-type" content="text/html; charset=UTF-8">
  <script>
      function runTest()
      {
          // Turn off smooth scrolling to prevent multiple scroll events from
          // being triggered. The iframe loaded below expects a single scroll
          // event, after which it runs the repaint test.
          internals.settings.setScrollAnimatorEnabled(false);

          frames[0].focus();
          if (window.eventSender) {
              eventSender.keyDown("PageDown");
          }
      }
  </script>
</head>
  <body onload="runTest()">
    If running this test manually put focus inside the iframe and hit 'page down'.
    <iframe style="width:500px; height:500px" src="../resources/fixed-move-after-keyboard-scroll-iframe.html"></iframe>
  </body>
</html>