[Testing] Remove requirement of adding new SPI for each preference that needs testing
Created attachment 412485 [details] Patch
Created attachment 412491 [details] Patch
Created attachment 412492 [details] Patch
Created attachment 412494 [details] Patch
Created attachment 412496 [details] Patch
Darin, you have reviewed most of this before for https://bugs.webkit.org/show_bug.cgi?id=217880. This is just breaking that change up a bit.
Committed r269105: <https://trac.webkit.org/changeset/269105> All reviewed patches have been landed. Closing bug and clearing flags on attachment 412496 [details].
<rdar://problem/70765829>