This will allow the blink-layer ICE-transport handling code
to use the virtual interface class rather than the concrete
implementation class.
Bug: chromium:864871
Change-Id: I5dfd1f266b3f3eabe42e09ba35afe218d25634b1
Reviewed-on: https://webrtc-review.googlesource.com/c/118360
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Steve Anton <steveanton@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26333}