Track stats are roughly equal in size as the RTP stream stats which are the largest objects making up the majority of the RTCStatsReport size and scales with meeting size. Deleting track/stream reduces the size in approximately half which should reduce performance overhead and unblock code simplifications. Blocked on: - https://chromium-review.googlesource.com/c/chromium/src/+/4517530 # Relevant bots already passed NOTRY=True Bug: webrtc:14175, webrtc:14419 Change-Id: Ib7bdb84c10459b42b829228d11876498e5227312 Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/289043 Reviewed-by: Harald Alvestrand <hta@webrtc.org> Commit-Queue: Henrik Boström <hbos@webrtc.org> Cr-Commit-Position: refs/heads/main@{#40129}