<!DOCTYPE html>
<html lang="en">
  <head>
    <meta charset="utf-8">
    <title>Test for bug 1375833</title>
  </head>
  <body onload="test();">
    <iframe id="testFrame" src="file_bug1375833-frame1.html"></iframe>
    <script type="application/javascript">
    function test() {
      let iframe = document.querySelector("#testFrame");
      setTimeout(function() { iframe.src = "file_bug1375833-frame1.html"; }, 0);
      iframe.onload = function(e) {
        setTimeout(function() { iframe.src = "file_bug1375833-frame2.html"; }, 0);
        iframe.onload = function() {
          opener.postMessage(iframe.contentWindow.location.href, "*");
        };
      };
    }
    </script>
  </body>
</html>
