This method is used by GetStats, and hence must not modify any state.
This cl is step one of the api change, the non-const version of the
method can be deleted once downstream implementations of this
interface are updated.
Bug: webrtc:11622
Change-Id: Icfaccee6bc918ac5c8a39dd2567a1081e342e9e8
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/183881
Reviewed-by: Ivo Creusen <ivoc@webrtc.org>
Commit-Queue: Niels Moller <nisse@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32072}
0240bcc1f3