42a70e31d6
Reason for revert:
Breaks chromium bots
Original issue's description:
> Rename thread annotation macros to have RTC prefix for syncrhonization primitives.
>
> other macros (e.g. GUARDED_BY) rename postpone to followup CL
> since it touches codebase wider
>
> BUG=webrtc:8198
>
> Review-Url: https://codereview.webrtc.org/3004393002
> Cr-Commit-Position: refs/heads/master@{#19701}
> Committed: 9a2d2dd973
TBR=kwiberg@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:8198
Review-Url: https://codereview.webrtc.org/3008193002
Cr-Commit-Position: refs/heads/master@{#19702}