Currently the code in NetEqTestFactory will crash when something unexpected happens. It would be better to return a nullptr instead and let the caller decide how to proceed. Bug: webrtc:10337 Change-Id: I3cfdffa7e6f2016eeaa5d6e80c5dd6c954ef8485 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/127894 Reviewed-by: Pablo Barrera González <barrerap@webrtc.org> Commit-Queue: Ivo Creusen <ivoc@webrtc.org> Cr-Commit-Position: refs/heads/master@{#27226}