and move usages to webrtc::RefCountInterface This CL also moves more stuff to webrtc:: and adds backwards compatible aliases for them. Bug: webrtc:42225969 Change-Id: Iefb8542cff793bd8aa46bef8f2f3c66a1e979d07 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/353720 Reviewed-by: Florent Castelli <orphis@webrtc.org> Commit-Queue: Harald Alvestrand <hta@webrtc.org> Cr-Commit-Position: refs/heads/main@{#42446}