Move synthesizedBaselineFromBorderBox to RenderBox since there are various call sites using it.
Created attachment 425156 [details] Patch
Comment on attachment 425156 [details] Patch r=me
Committed r275494: <https://commits.webkit.org/r275494> All reviewed patches have been landed. Closing bug and clearing flags on attachment 425156 [details].
<rdar://problem/76257936>