This makes certain fuzzers easier to write.
Bug: none
Change-Id: If1dad462ff71075c9cc81d35f19556b4c1b7108f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/209221
Reviewed-by: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Harald Alvestrand <hta@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#33368}