The following tests crashes sometimes on GTK: http/tests/security/contentSecurityPolicy/upgrade-insecure-requests/upgrade-insecure-audio-video-in-main-frame.html
I see no crashes, bots seems happy now.
Created attachment 424354 [details] Patch for landing
Committed r275095: <https://commits.webkit.org/r275095> All reviewed patches have been landed. Closing bug and clearing flags on attachment 424354 [details].