Add access in sandbox to required Mach message in the WebContent process on iOS.
<rdar://88300200>
Created attachment 450655 [details] Patch
Comment on attachment 450655 [details] Patch r=me
Comment on attachment 450655 [details] Patch Thanks for reviewing!
Committed r288957 (246686@main): <https://commits.webkit.org/246686@main> All reviewed patches have been landed. Closing bug and clearing flags on attachment 450655 [details].