main frame - didFinishDocumentLoadForFrame
main frame - didStartProvisionalLoadForFrame
main frame - didHandleOnloadEventsForFrame
main frame - didFinishLoadForFrame
main frame - didCommitLoadForFrame
CONSOLE MESSAGE: line 4: [blocked] The page at https://127.0.0.1:8443/security/mixedContent/resources/frame-with-insecure-css.html was not allowed to run insecure content from http://127.0.0.1:8080/security/mixedContent/resources/style.css.

main frame - didFinishDocumentLoadForFrame
main frame - didHandleOnloadEventsForFrame
main frame - didFinishLoadForFrame
This test opens a window that loads an insecure style sheet. We should trigger a mixed content callback because the main frame in the window is HTTPS but is running insecure content.