After further testing we have determined that we no longer need the syscall added in Bug 206260. Let's remove it, since it provides no value.
<rdar://problem/63764590>
Created attachment 400751 [details] Patch
I misunderstood the issue. The symbol is conditionally enabled, so the sandbox needs to see if it is defined before allowing access.
Created attachment 400753 [details] Patch
Comment on attachment 400753 [details] Patch R=me.
Committed r262396: <https://trac.webkit.org/changeset/262396> All reviewed patches have been landed. Closing bug and clearing flags on attachment 400753 [details].