page_with_sandboxed_srcdoc_iframe.html

<html>
<head></head>
<body>
  <p>This page has a sandboxed srcdoc iframe. Yay for sandboxed srcdoc iframes!
  <p><iframe id="test_iframe"
             name="test_iframe"
             sandbox="allow-scripts"
             srcdoc="foo"></iframe>
</body>
</html>

chromium/content/test/data/page_with_sandboxed_srcdoc_iframe.html