Make synthesizedBaselineFromContentBox return LayoutUnit.
Created attachment 425268 [details] Patch
Created attachment 425277 [details] Patch
Comment on attachment 425277 [details] Patch r=me
Committed r275594: <https://commits.webkit.org/r275594> All reviewed patches have been landed. Closing bug and clearing flags on attachment 425277 [details].
<rdar://problem/76326370>