This ensures that last_cursor_ is intialized before it is checked.
This code is in the Firefox repo with the original review here:
https://phabricator.services.mozilla.com/D113833
Bug: webrtc:13481
Change-Id: I806009cba1aba193ab12bb86e39f98c56043000f
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/239725
Reviewed-by: Kári Helgason <kthelgason@webrtc.org>
Reviewed-by: Harald Alvestrand <hta@webrtc.org>
Reviewed-by: Stefan Holmer <stefan@webrtc.org>
Commit-Queue: Stefan Holmer <stefan@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#35509}