file_bug1375833.html

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<!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() {

        setTimeout(function() { iframe.src = "file_bug1375833-frame2.html"; }, 0);

        iframe.onload = function() {

          opener.postMessage(iframe.contentWindow.location.href, "*");

};

};

    </script>

  </body>

</html>