Instead of using raw pointers. Bug: webrtc:15368, webrtc:11943 Change-Id: Id28a0a4fc3d00680e972bd95e0c60344c7886892 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/328500 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Per Kjellander <perkj@webrtc.org> Cr-Commit-Position: refs/heads/main@{#41237}