There's already a DCHECK at construction time ensuring that it's set.
Bug: webrtC:9883
Change-Id: I9f41b77273bb859626546ab3534d483d9172ea5d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/155581
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Oskar Sundbom <ossu@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#29393}