chromium/chrome/test/data/webrtc/sub_capture_other_main.html

<html>
  <head>
    <!-- The test scans for which source to share according to the title. -->
    <title>Region/Element Capture Test - Page 2 (Main)</title>
    <link rel="icon" href="data:," />
    <script src="sub_capture_helpers.js"></script>
    <script>
      "use strict";

      setRole("top-level");
    </script>
  </head>
  <body onload="onLoad();">
    <div id="div">
      <!-- This DIV is just a convenient target. -->
      <p id="p_id">0</p>
      <br />
      <iframe id="embedded_frame" allow="display-capture *"></iframe>
    </div>
    <iframe id="mailman_frame" hidden></iframe>
    <script>
      function onLoad() {
        animate(document.getElementById('p_id'));
      }
    </script>
  </body>
</html>