<!DOCTYPE HTML>
<html>
<head>
  <meta charset="utf-8">
  <script>
    function test() {
      history.scrollRestoration = "manual";
      document.getElementById("initialfocus").focus();
      history.pushState('data', '', '');
      history.back();
    }

    window.onpopstate = function() {
      window.onscroll = function() {
        window.onscroll = null;
        document.documentElement.style.display = "none";
        // focus() triggers recreation of the nsIFrames without a reflow.
        document.getElementById("focustarget").focus();
        document.documentElement.style.display = "";
        // Flush the layout.
        document.documentElement.getBoundingClientRect();
        opener.isnot(window.scrollY, 0, "The page should have been scrolled down(1)");
        requestAnimationFrame(
          function() {
            // Extra timeout to ensure we're called after rAF has triggered a
            // reflow.
            setTimeout(function() {
              opener.isnot(window.scrollY, 0, "The page should have been scrolled down(2)");
              window.close();
              opener.SimpleTest.finish();
            });
        });
      }
      window.scrollTo(0, 1000);
    }
  </script>
</head>
<body onload="setTimeout(test)">
<div style="position: fixed;">
  <input type="button" value="" id="initialfocus">
  <input type="button" value="" id="focustarget">
</div>
<div style="border: 1px solid black; width: 100px; height: 9000px;"></div>
</body>
</html>
