Before this CL, the next_tsn was stored as a variable, but that was
not needed as it can be calculated from the higest outstanding TSN. The
next TSN is simply the value after the highest outstanding TSN.
The highest outstanding TSN calculation could be simplified as well,
as the outstanding_data_ is contiguous list of TSNs counted from
last_cumulative_tsn_ack_.
Bug: None
Change-Id: Iafe188683427b5f2959d5ce2b19b5943d4760791
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/329421
Commit-Queue: Victor Boivie <boivie@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41303}
032805068c