Make it compile and link successfully.
Created attachment 411907 [details] WIP Patch
Created attachment 412099 [details] Patch
Created attachment 412101 [details] Patch
Committed r268869: <https://trac.webkit.org/changeset/268869> All reviewed patches have been landed. Closing bug and clearing flags on attachment 412101 [details].
<rdar://problem/70577479>