CONSOLE ERROR: line 3: Unsafe 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,%0A       <script>%0A       var win = window.open('about:blank', '_top');%0A       console.log(win ? 'FAIL' : 'PASS');%0A       </script>'. The frame attempting navigation of the top-level window is sandboxed, but the flag of 'allow-top-navigation' or 'allow-top-navigation-by-user-activation' is not set.

CONSOLE MESSAGE: line 4: PASS
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