Add internal preference to disable HTTPS upgrade
Created attachment 422335 [details] Patch
Committed r273950: <https://commits.webkit.org/r273950> All reviewed patches have been landed. Closing bug and clearing flags on attachment 422335 [details].
<rdar://problem/75080279>
This isn't how preferences normally work.
The right way do use the configuration and preferences here is to have the configuration option feed into a preference (and setting in WebCore). So Page::m_httpsUpgradeEnabled should not exist; that should just be a Setting.