This prevents a lot of unnecessary processing taking place when we are
not using FEC.
This CL also removes the FieldTrial that was used to disable ulpfec, as it's no longer used.
Bug: webrtc:9514
Change-Id: I8285b933f71eea971f5932cd19833455a42c8639
Reviewed-on: https://webrtc-review.googlesource.com/87848
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Reviewed-by: Rasmus Brandt <brandtr@webrtc.org>
Commit-Queue: Kári Helgason <kthelgason@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23952}
798ee75d23