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chromium/third_party/blink/web_tests/external/wpt/html/browsers/sandboxing/sandbox-allow-scripts.html 

<!DOCTYPE html>
<html>
  <head>
    <title>Script execution in sandbox="allow-scripts" iframe</title>
    <link rel="author" title="Kinuko Yasuda" href="mailto:[email protected]">
    <link rel="help" href="http://www.w3.org/html/wg/drafts/html/master/browsers.html#sandboxing">
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
  </head>

  <body>
    <h1>Script execution in sandbox="allow-scripts" iframe</h1>
    <script type="text/javascript">
      var t = async_test("Running script from sandbox='allow-scripts' iframe is allowed")
      var called = 0;
      function calledFromIframe() {
        called++;
      }
      function loaded() {
        assert_equals(called, 1);
        t.done();
      }
    </script>

    <iframe src="/html/browsers/sandboxing/inner-iframe.html" style="visibility:hidden;display:none" sandbox="allow-scripts allow-same-origin" id="sandboxedframe" onload="loaded();"></iframe>

    <div id="log"></div>
  </body>
</html>