This should help users of the library to more easily debug issues. Bug: None Change-Id: I85d8101d3b26ccbc34c8beded069461252e61293 Reviewed-on: https://webrtc-review.googlesource.com/4663 Reviewed-by: Magnus Jedvert <magjed@webrtc.org> Reviewed-by: Sami Kalliomäki <sakal@webrtc.org> Commit-Queue: Sami Kalliomäki <sakal@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20073}