1f9e6046dd
The old version of these returns -1 when the value is not set. Optional is better. Bug: webrtc:42220231 Change-Id: Ideb0f51fd8bb7b5aa490743eb3b5d95998efbd1f Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/374483 Reviewed-by: Henrik Boström <hbos@webrtc.org> Commit-Queue: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#43786}