It's unnecessary and wastes a lot of space due to alignment requirements.
Created attachment 362915 [details] Patch
Comment on attachment 362915 [details] Patch r=me
Comment on attachment 362915 [details] Patch Clearing flags on attachment: 362915 Committed r242257: <https://trac.webkit.org/changeset/242257>
All reviewed patches have been landed. Closing bug.
<rdar://problem/48502752>