Since it's a common pattern it makes sense to explicitly provide the
interface rather than reimplementing it every time it's used.
Bug: webrtc:9883
Change-Id: I4dca84bd7c8616fcbcbaba511718671a3668e743
Reviewed-on: https://webrtc-review.googlesource.com/c/122300
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Oskar Sundbom <ossu@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#26664}