Reason for revert:
Breaks bots
Original issue's description:
> Deliver reordered packets in arrival time order after parsing feedback message.
>
> This is what the remote bitrate estimator expects.
>
> BUG=5823
> R=sprang@webrtc.org
>
> Committed: https://crrev.com/ed9535e2cac6be7a45fb03dc8426ef3b0ec43294
> Cr-Commit-Position: refs/heads/master@{#12527}
TBR=sprang@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=5823
Review URL: https://codereview.webrtc.org/1928443004
Cr-Commit-Position: refs/heads/master@{#12528}