GetBandwidthObserver should be used instead as it exposes a smaller interface. Bug: webrtc:8415 Change-Id: I29ca795657e205186d7ebd929e756038a294b5f7 Reviewed-on: https://webrtc-review.googlesource.com/23900 Reviewed-by: Björn Terelius <terelius@webrtc.org> Reviewed-by: Stefan Holmer <stefan@webrtc.org> Commit-Queue: Sebastian Jansson <srte@webrtc.org> Cr-Commit-Position: refs/heads/master@{#20871}