Erik Språng 4580ca2e99 Reland: Add ability to set ssrcs of RtpSender at construction time
Patch set 1 is identical to original CL. Next one adds fix for
backwards compatibilit.

Original cl: https://webrtc-review.googlesource.com/c/src/+/144037

Bug: webrtc:10774
Change-Id: Ib72e3723c7a07e9ee83f97560a85367becd868a1
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/144601
Reviewed-by: Åsa Persson <asapersson@webrtc.org>
Commit-Queue: Erik Språng <sprang@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#28485}
2019-07-04 11:50:19 +00:00
..