Because it's enabled on all Cocoa ports, and we have shipped it for years and don't plan on disabling it, we can just stop consulting with the ENABLE() in Cocoa-specific files. Also, we can start the process of enabling it for all ports by at least compiling in the internal data structures for it on all ports (but not have any web-exposed behavior change).
Created attachment 408070 [details] Patch
Created attachment 408140 [details] Patch
Committed r266686: <https://trac.webkit.org/changeset/266686> All reviewed patches have been landed. Closing bug and clearing flags on attachment 408140 [details].
<rdar://problem/68437601>