Now that there is only one implementation of the decision logic, there
is no longer any need to have GetDecisionSpecialized being separate.
Bug: webrtc:9421
Change-Id: Id364ce09ac05d106652d749502058056f11bba27
Reviewed-on: https://webrtc-review.googlesource.com/86604
Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
Commit-Queue: Henrik Lundin <henrik.lundin@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#23804}