chromium/content/test/data/frame_tree/page_with_two_iframes.html

<!DOCTYPE html>
<head>
<style>
iframe[name="frame1"] {
  position:absolute;
  top: 20px;
  left: 20px;
  width: 100px;
  height: 100px;
}
iframe[name="frame2"] {
  position:absolute;
  top: 20px;
  left: 20px;
  width: 100px;
  height: 100px;
}
</style>
</head>
<body>
  This page has two iframes: both are cross-site.
  <iframe name="frame1" src="/cross-site/bar.com/title1.html"></iframe>
  <iframe name="frame2" src="/cross-site/baz.com/title1.html"></iframe>
</body>
</html>