fa266efb27
When GetSources is called with non-existing ssrc, it will log the error and return an empty RtpSource list instead of hitting the DCHECK. Bug: chromium:793699 Change-Id: I30bebb657de32f87f9c82920fa0b19403893791f Reviewed-on: https://webrtc-review.googlesource.com/32860 Reviewed-by: Taylor Brandstetter <deadbeef@webrtc.org> Reviewed-by: Henrik Boström <hbos@webrtc.org> Commit-Queue: Zhi Huang <zhihuang@webrtc.org> Cr-Commit-Position: refs/heads/master@{#21258}