7c8786ae8f
Reason for revert:
Breaks mac build
Original issue's description:
> GN: Enable ARC for Mac and iOS in rtc_* templates
>
> Remove all uses of retain/release and NSAutoreleasePool.
>
> This makes transformation to Bazel easier.
>
> This CL subsumes https://codereview.webrtc.org/2778163002 and depends on https://codereview.webrtc.org/2784483002/
>
> BUG=webrtc:6412
>
> Review-Url: https://codereview.webrtc.org/2781713004
> Cr-Commit-Position: refs/heads/master@{#17780}
> Committed: 6bda02b51d
TBR=kjellander@webrtc.org,magjed@webrtc.org,stefan@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6412
Review-Url: https://codereview.webrtc.org/2827223003
Cr-Commit-Position: refs/heads/master@{#17784}