Replaced by a int64_t representing time in us. To aid transition of downstream code, rtc::PacketTime is made an alias for int64_t. Bug: webrtc:9584 Change-Id: Ic3a5ee87d6de2aad7712894906dab074f1443df9 Reviewed-on: https://webrtc-review.googlesource.com/c/91860 Reviewed-by: Karl Wiberg <kwiberg@webrtc.org> Commit-Queue: Niels Moller <nisse@webrtc.org> Cr-Commit-Position: refs/heads/master@{#25503}