Deny mach lookup access to "com.apple.frontboard.systemappservices" in the WebContent process on iOS.
rdar://problem/56995354
Created attachment 394619 [details] Patch
Comment on attachment 394619 [details] Patch Thanks for reviewing!
Committed r259052: <https://trac.webkit.org/changeset/259052> All reviewed patches have been landed. Closing bug and clearing flags on attachment 394619 [details].