This makes it easier to have the new and the old send side congestion
controller side by side. This namespace is only temporary. As soon the
new task queue based congestion controller is fully functional, the old
will be deprecated and removed together with the temporary namespace.
Bug: webrtc:8415
Change-Id: Ie817511345c91cab2ebca68f038075875c7e6529
Reviewed-on: https://webrtc-review.googlesource.com/56720
Commit-Queue: Sebastian Jansson <srte@webrtc.org>
Reviewed-by: Björn Terelius <terelius@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#22221}