Also consolidate lock operations to public methods only, moving one CritScope out of UpdateCounters (private) up to IncomingPacket (public). Bug: webrtc:7135 Change-Id: I458857d3cfa49961fa34196ffe02cdefd83cec10 Reviewed-on: https://webrtc-review.googlesource.com/96122 Reviewed-by: Danil Chapovalov <danilchap@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#24443}