Until we have proper OS support, we need to disable audio capture in WebProcess when app is backgrounded even though app has the right UIBackgroundModes value.
<rdar://problem/70241557>
Created attachment 411854 [details] Patch
Created attachment 411857 [details] Patch
Created attachment 411862 [details] Patch
Created attachment 411965 [details] Patch for landing
Committed r268791: <https://trac.webkit.org/changeset/268791> All reviewed patches have been landed. Closing bug and clearing flags on attachment 411965 [details].