This reverts commit 7db900e2e78d1644a173a0bc505ad52c61c43f9b. Reason for revert: Speculative revert Original change's description: > Simplify pacer queue > > This CL simplifies the pacer queue by removing the now unnecessary > beginpop/cancelpop/finalizepop methods. Instead there's a const top() > and a pop() much like an stl queue. > Old methods using the deprecated pacing code path are cleaned away. > > Bug: webrtc:10633 > Change-Id: Ib6da4d46a571bf56415172b790cc9e3f63206a38 > Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/150522 > Commit-Queue: Erik Språng <sprang@webrtc.org> > Reviewed-by: Philip Eliasson <philipel@webrtc.org> > Cr-Commit-Position: refs/heads/master@{#28997} TBR=sprang@webrtc.org,philipel@webrtc.org # Not skipping CQ checks because original CL landed > 1 day ago. Bug: webrtc:10633 Change-Id: I38f61afed4f4d542e236bcce3152a3aab52c6e6b Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/151120 Reviewed-by: Erik Språng <sprang@webrtc.org> Commit-Queue: Erik Språng <sprang@webrtc.org> Cr-Commit-Position: refs/heads/master@{#29030}