<!DOCTYPE html>
<html>
  <head>
    <meta charset="utf-8" />
    <title>Blank Page</title>
    <script>
      window.onload = function(event) {
        // This is needed to ensure the onload event fires when this page is
        // opened as a popup.
        // See https://github.com/web-platform-tests/wpt/pull/18157
      };
    </script>
  </head>
  <body>
  </body>
</html>