Our style guide dictates that we should prefer using return values rather
than output parameters when we can. Some of the methods like
MaxSpeakerVolume() are not required to be able to provide a value. In
these cases I changed the return type to an rtc::Optional.
Also, this CL fixes a bug with StereoRecordingIsAvailable() that would
not previously be passed along correctly in the template layer.
Bug: webrtc:7452
Change-Id: I0a1f455093bfe092627118d65a996212a65eeb2b
Reviewed-on: https://webrtc-review.googlesource.com/64401
Reviewed-by: Paulina Hensman <phensman@webrtc.org>
Commit-Queue: Magnus Jedvert <magjed@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22629}
ff4cac9c48