Adopt Span in Base64.h
Created attachment 431684 [details] Patch
Created attachment 431798 [details] Patch
Created attachment 431802 [details] Patch
Committed r279051 (238971@main): <https://commits.webkit.org/238971@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 431802 [details].
<rdar://problem/79529906>