This is needed to be able to debug test cases when they fail. Bug: webrtc:12961 Change-Id: I39bfe532709d02acb328ff5fdd005d33be4dc31c Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/225544 Commit-Queue: Victor Boivie <boivie@webrtc.org> Reviewed-by: Florent Castelli <orphis@webrtc.org> Cr-Commit-Position: refs/heads/master@{#34452}