Reason for revert:
Break performance bots.
Original issue's description:
> Fix off-by-one bugs in video_coding::PacketBuffer when the buffer is filled with a single frame.
>
> BUG=webrtc:8028
>
> Review-Url: https://codereview.webrtc.org/2993513002
> Cr-Commit-Position: refs/heads/master@{#19209}
> Committed: ee13e8919c
TBR=stefan@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:8028
Review-Url: https://codereview.webrtc.org/2990183002
Cr-Commit-Position: refs/heads/master@{#19211}
Name: WebRTC URL: http://www.webrtc.org Version: 90 License: BSD License File: LICENSE Description: WebRTC provides real time voice and video processing functionality to enable the implementation of PeerConnection/MediaStream. Third party code used in this project is described in the file LICENSE_THIRD_PARTY.