Revert of Move congestion controller processing to the pacer thread.

Revert of Move congestion controller processing to the pacer thread. (patchset #5 id:80001 of https://codereview.webrtc.org/2637783003/ )

Reason for revert:
Speculative revert for perf regression related to ramp-up on android. See https://bugs.chromium.org/p/chromium/issues/detail?id=682611

Original issue's description:
> Move congestion controller processing to the pacer thread.
> 
> Also rename it from pacer_thread_ to congestion_controller_thread_.
> 
> BUG=webrtc:6847
> 
> Review-Url: https://codereview.webrtc.org/2637783003
> Cr-Commit-Position: refs/heads/master@{#16134}
> Committed: https://chromium.googlesource.com/external/webrtc/+/b3dc2b7b1e02970c49064a61a4bd0fc941249c93

TBR=danilchap@webrtc.org,stefan@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:6847
Review-Url: https://codereview.webrtc.org/2644603003
Cr-Commit-Position: refs/heads/master@{#16163}
Committed: https://chromium.googlesource.com/external/webrtc/+/b93598465d85a7df2f601058260eb2edc26b93ab

[nisse-webrtc, 2017-01-19 12:25:12]

The CQ bit was checked by nisse@webrtc.org

[nisse-webrtc, 2017-01-19 12:25:13]

Created Revert of Move congestion controller processing to the pacer thread.

[commit-bot: I haz the power, 2017-01-19 12:25:24]

CQ is trying da patch. Follow status at
 
https://chromium-cq-status.appspot.com/v2/patch-status/codereview.webrtc.org/...

[commit-bot: I haz the power, 2017-01-19 13:41:26]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1484828712955780, "parent_rev":
"6ce9259cb0bf875f444c2ea2992aa80a870c62c0", "commit_rev":
"b93598465d85a7df2f601058260eb2edc26b93ab"}

[commit-bot: I haz the power, 2017-01-19 13:41:28]

Description was changed from

==========
Revert of Move congestion controller processing to the pacer thread. (patchset
#5 id:80001 of https://codereview.webrtc.org/2637783003/ )

Reason for revert:
Speculative revert for perf regression related to ramp-up on android. See
https://bugs.chromium.org/p/chromium/issues/detail?id=682611

Original issue's description:
> Move congestion controller processing to the pacer thread.
> 
> Also rename it from pacer_thread_ to congestion_controller_thread_.
> 
> BUG=webrtc:6847
> 
> Review-Url: https://codereview.webrtc.org/2637783003
> Cr-Commit-Position: refs/heads/master@{#16134}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/b3dc2b7b1e02970c49064a61a...

TBR=danilchap@webrtc.org,stefan@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:6847
==========

to

==========
Revert of Move congestion controller processing to the pacer thread. (patchset
#5 id:80001 of https://codereview.webrtc.org/2637783003/ )

Reason for revert:
Speculative revert for perf regression related to ramp-up on android. See
https://bugs.chromium.org/p/chromium/issues/detail?id=682611

Original issue's description:
> Move congestion controller processing to the pacer thread.
> 
> Also rename it from pacer_thread_ to congestion_controller_thread_.
> 
> BUG=webrtc:6847
> 
> Review-Url: https://codereview.webrtc.org/2637783003
> Cr-Commit-Position: refs/heads/master@{#16134}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/b3dc2b7b1e02970c49064a61a...

TBR=danilchap@webrtc.org,stefan@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:6847

Review-Url: https://codereview.webrtc.org/2644603003
Cr-Commit-Position: refs/heads/master@{#16163}
Committed:
https://chromium.googlesource.com/external/webrtc/+/b93598465d85a7df2f6010582...
==========

[commit-bot: I haz the power, 2017-01-19 13:41:30]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/b93598465d85a7df2f6010582...