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chromium/third_party/blink/web_tests/external/wpt/html/browsers/browsing-the-web/history-traversal/001-1.html 

<!doctype html>
001-1
<script>
addEventListener("pageshow",
  function(e) {
    parent.events.push(e);
    if (parent.events.length == 2) {
      parent.do_test();
    }
  }, false);
</script>