Reland of Add functionality which limits the number of bytes on the network.

Reland of Add functionality which limits the number of bytes on the network. (patchset #1 id:1 of https://codereview.webrtc.org/3001653002/ )

Reason for revert:
Reland

Original issue's description:
> Revert of Add functionality which limits the number of bytes on the network. (patchset #26 id:500001 of https://codereview.webrtc.org/2918323002/ )
> 
> Reason for revert:
> Speculative revert to see if this caused regressions in android perf tests.
> 
> Original issue's description:
> > Add functionality which limits the number of bytes on the network.
> > 
> > The limit is based on the bandwidth delay product, but also adds some additional slack to compensate for the sawtooth-like BWE pattern and the slowness of the encoder rate control. The delay is estimated based on the time from sending a packet until an ack is received. Since acks are received in bursts (feedback is only sent periodically), a min filter is used to estimate the rtt.
> > 
> > Whenever the in flight bytes reaches the congestion window, the pacer is paused, which in turn will result in send-side queues growing. Eventually the encoders will be paused as the pacer queue grows large (currently 2 seconds).
> > 
> > BUG=webrtc:7926
> > 
> > Review-Url: https://codereview.webrtc.org/2918323002
> > Cr-Commit-Position: refs/heads/master@{#19289}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/8497fdde43d920ab1f0cc90362534e5493d23abe
> 
> TBR=terelius@webrtc.org,philipel@webrtc.org,tschumim@webrtc.org,gnish@webrtc.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=webrtc:7926
> 
> Review-Url: https://codereview.webrtc.org/3001653002
> Cr-Commit-Position: refs/heads/master@{#19339}
> Committed: https://chromium.googlesource.com/external/webrtc/+/64136af364d1fecada49e35b1bfa39ef2641d5d0

TBR=terelius@webrtc.org,philipel@webrtc.org,tschumim@webrtc.org,gnish@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7926
Review-Url: https://codereview.webrtc.org/2994343002
Cr-Commit-Position: refs/heads/master@{#19373}
Committed: https://chromium.googlesource.com/external/webrtc/+/9e117c5e1b279aa2920786351eaf72b4f07ce295

[stefan-webrtc, 2017-08-16 13:59:52]

The CQ bit was checked by stefan@webrtc.org

[stefan-webrtc, 2017-08-16 13:59:53]

Created Reland of Add functionality which limits the number of bytes on the
network.

[commit-bot: I haz the power, 2017-08-16 14:00:02]

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, 2017-08-16 15:16:26]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1502891992475660, "parent_rev":
"5901d9dfe072e9e4b13459e122b26f6ff327fe78", "commit_rev":
"9e117c5e1b279aa2920786351eaf72b4f07ce295"}

[commit-bot: I haz the power, 2017-08-16 15:16:31]

Description was changed from

==========
Reland of Add functionality which limits the number of bytes on the network.
(patchset #1 id:1 of https://codereview.webrtc.org/3001653002/ )

Reason for revert:
Reland

Original issue's description:
> Revert of Add functionality which limits the number of bytes on the network.
(patchset #26 id:500001 of https://codereview.webrtc.org/2918323002/ )
> 
> Reason for revert:
> Speculative revert to see if this caused regressions in android perf tests.
> 
> Original issue's description:
> > Add functionality which limits the number of bytes on the network.
> > 
> > The limit is based on the bandwidth delay product, but also adds some
additional slack to compensate for the sawtooth-like BWE pattern and the
slowness of the encoder rate control. The delay is estimated based on the time
from sending a packet until an ack is received. Since acks are received in
bursts (feedback is only sent periodically), a min filter is used to estimate
the rtt.
> > 
> > Whenever the in flight bytes reaches the congestion window, the pacer is
paused, which in turn will result in send-side queues growing. Eventually the
encoders will be paused as the pacer queue grows large (currently 2 seconds).
> > 
> > BUG=webrtc:7926
> > 
> > Review-Url: https://codereview.webrtc.org/2918323002
> > Cr-Commit-Position: refs/heads/master@{#19289}
> > Committed:
https://chromium.googlesource.com/external/webrtc/+/8497fdde43d920ab1f0cc9036...
> 
>
TBR=terelius@webrtc.org,philipel@webrtc.org,tschumim@webrtc.org,gnish@webrtc.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=webrtc:7926
> 
> Review-Url: https://codereview.webrtc.org/3001653002
> Cr-Commit-Position: refs/heads/master@{#19339}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/64136af364d1fecada49e35b1...

TBR=terelius@webrtc.org,philipel@webrtc.org,tschumim@webrtc.org,gnish@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7926
==========

to

==========
Reland of Add functionality which limits the number of bytes on the network.
(patchset #1 id:1 of https://codereview.webrtc.org/3001653002/ )

Reason for revert:
Reland

Original issue's description:
> Revert of Add functionality which limits the number of bytes on the network.
(patchset #26 id:500001 of https://codereview.webrtc.org/2918323002/ )
> 
> Reason for revert:
> Speculative revert to see if this caused regressions in android perf tests.
> 
> Original issue's description:
> > Add functionality which limits the number of bytes on the network.
> > 
> > The limit is based on the bandwidth delay product, but also adds some
additional slack to compensate for the sawtooth-like BWE pattern and the
slowness of the encoder rate control. The delay is estimated based on the time
from sending a packet until an ack is received. Since acks are received in
bursts (feedback is only sent periodically), a min filter is used to estimate
the rtt.
> > 
> > Whenever the in flight bytes reaches the congestion window, the pacer is
paused, which in turn will result in send-side queues growing. Eventually the
encoders will be paused as the pacer queue grows large (currently 2 seconds).
> > 
> > BUG=webrtc:7926
> > 
> > Review-Url: https://codereview.webrtc.org/2918323002
> > Cr-Commit-Position: refs/heads/master@{#19289}
> > Committed:
https://chromium.googlesource.com/external/webrtc/+/8497fdde43d920ab1f0cc9036...
> 
>
TBR=terelius@webrtc.org,philipel@webrtc.org,tschumim@webrtc.org,gnish@webrtc.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=webrtc:7926
> 
> Review-Url: https://codereview.webrtc.org/3001653002
> Cr-Commit-Position: refs/heads/master@{#19339}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/64136af364d1fecada49e35b1...

TBR=terelius@webrtc.org,philipel@webrtc.org,tschumim@webrtc.org,gnish@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7926

Review-Url: https://codereview.webrtc.org/2994343002
Cr-Commit-Position: refs/heads/master@{#19373}
Committed:
https://chromium.googlesource.com/external/webrtc/+/9e117c5e1b279aa2920786351...
==========

[commit-bot: I haz the power, 2017-08-16 15:16:32]

Committed patchset #1 (id:1) as
https://chromium.googlesource.com/external/webrtc/+/9e117c5e1b279aa2920786351...