CONSOLE MESSAGE: Unsafe JavaScript attempt to initiate navigation for frame with URL 'http://127.0.0.1:8000/security/no-popup-from-sandbox-top.html' from frame with URL 'data:text/html,       <script>       var win = window.open('about:blank', '_top');       alert(win ?%20'FAIL'%20:%20'PASS');%20%20%20%20%20%20%20%3C/script%3E'. The frame attempting navigation of the top-level window is sandboxed, but the 'allow-top-navigation' flag is not set.

ALERT: PASS
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