This is part of a series of CLs removing RTP dependencies from GoogCC
implementation.
Bug: webrtc:10749
Change-Id: I73e9402136cc16902d177234d63369938f191e5b
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/142223
Reviewed-by: Jonas Olsson <jonasolsson@webrtc.org>
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28302}