if higher layer is enabled, then disabled, then key-frame is issued, then
the layer is enabled again, the buffer would contain a picture from before
the key-frame and it might have a higher pid than the currently encoded one.
This would trigger the DCHECK. It's safe to remove the DCHECK completely, because
such occasions would cause unsigned overflow and cause the following check for
maximum allowed picture difference to fail and the wrong picture won't
be used as a temporal reference.
This error only caused failures in debug builds and couldn't lead to corruptions
because there're periodical key-frames generated and pid difference can never become so
big that negative value would overflow to something close to 0.
Bug: webrtc:10257
Change-Id: Ie3b3ed0e24421787e3b40a37987ccecb75d04635
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/151643
Reviewed-by: Sergey Silkin <ssilkin@webrtc.org>
Commit-Queue: Ilya Nikolaevskiy <ilnik@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29099}
30323e2fb2