d02541e276
This wires up the "state change" event and defines an observer class that can be used by clients. Bug: chromium:907849 Change-Id: I3cba2dc051a56280fb958f139f29cbb0022a39c6 Reviewed-on: https://webrtc-review.googlesource.com/c/114884 Commit-Queue: Harald Alvestrand <hta@webrtc.org> Reviewed-by: Steve Anton <steveanton@webrtc.org> Reviewed-by: Henrik Boström <hbos@webrtc.org> Cr-Commit-Position: refs/heads/master@{#26120}