SSCC was accessing the pacer just to report values back to RtpTransportControllerSend which already owns the pacer. This CL moves those access methods. To make RtpTransportControllerSend simpler, Call is made responsible to keep track of network status used only as a condition for report the pacer queuing delay. Bug: webrtc:8415 Change-Id: I306bc9fcd3d8dcc7a637d51f2629ececebd48cad Reviewed-on: https://webrtc-review.googlesource.com/60483 Reviewed-by: Stefan Holmer <stefan@webrtc.org> Reviewed-by: Niels Moller <nisse@webrtc.org> Commit-Queue: Sebastian Jansson <srte@webrtc.org> Cr-Commit-Position: refs/heads/master@{#22331}