98b3588974
These methods previously had a default implementation that triggered a crash. All implementations must now return a valid object, which simplifies the code that calls them. Bug: webrtc:13931 Change-Id: I877fbc929b58c6b83767c6ac5a81c8aa942e3fef Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/369021 Commit-Queue: Tomas Gunnarsson <tommi@webrtc.org> Reviewed-by: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#43453}