We need to decide on the Page protection as a component RfC.
Closed--duplicate of T470.
Unfortunately, the patch is not merged yet. I'll update with this tracking number, and try to nudged forward a bit.
Change 166357 had a related patch set uploaded (by Awight):
Componentize Title permissions logic
Change 203287 had a related patch set uploaded (by Awight):
WIP Refactor TitleSecurity to eliminate state