Reland of Periodically update codec bit/frame rate settings.

Reland of Periodically update codec bit/frame rate settings. (patchset #1 id:1 of https://codereview.webrtc.org/2923993002/ )

Reason for revert:
Create reland cl that we can patch with fix.

Original issue's description:
> Revert of Periodically update codec bit/frame rate settings. (patchset #8 id:140001 of https://codereview.webrtc.org/2883963002/ )
> 
> Reason for revert:
> Breaks some Call perf tests that are not run by the try bots....
> 
> Original issue's description:
> > Fix bug in vie_encoder.cc which caused channel parameters not to be updated at regular intervals, as it was intended.
> > 
> > That however exposes a bunch of failed test, so this CL also fixed a few other things:
> > * FakeEncoder should trust the configured FPS value rather than guesstimating itself based on the realtime clock, so as not to completely undershoot targets in offline mode. Also, compensate for key-frame overshoots when outputting delta frames.
> > * FrameDropper should not assuming incoming frame rate is 0 if no frames have been seen.
> > * Fix a bunch of test cases that started failing because they were relying on the fake encoder undershooting.
> > * Fix test 
> > 
> > BUG=7664
> > 
> > Review-Url: https://codereview.webrtc.org/2883963002
> > Cr-Commit-Position: refs/heads/master@{#18473}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/6431e21da672a5f3bbf166d3d4d98b171d015706
> 
> TBR=stefan@webrtc.org,holmer@google.com
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=7664
> 
> Review-Url: https://codereview.webrtc.org/2923993002
> Cr-Commit-Position: refs/heads/master@{#18475}
> Committed: https://chromium.googlesource.com/external/webrtc/+/5390c4814d7880ea79edcd55596ea25e0d9b97ad

TBR=stefan@webrtc.org,holmer@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=7664
Review-Url: https://codereview.webrtc.org/2924023002
Cr-Commit-Position: refs/heads/master@{#18497}
Committed: https://chromium.googlesource.com/external/webrtc/+/cdafeda1cb95ac49104b2cc5112bab8def863818

[sprang_webrtc, 2017-06-07 14:23:59]

Created Reland of Periodically update codec bit/frame rate settings.

[sprang_webrtc, 2017-06-07 14:29:58]

The CQ bit was checked by sprang@webrtc.org to run a CQ dry run

[commit-bot: I haz the power, 2017-06-07 14:30:05]

Dry run: 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, 2017-06-07 14:30:06]

The CQ bit was unchecked by commit-bot@chromium.org

[commit-bot: I haz the power, 2017-06-07 14:30:08]

Dry run: This issue passed the CQ dry run.

[sprang_webrtc, 2017-06-07 14:30:31]

sprang@webrtc.org changed reviewers:
- holmer@google.com

[sprang_webrtc, 2017-06-07 14:30:32]

stefan@, ptal at the delta from patch set 1 (only fake_encoder.cc has been
changed)

[stefan-webrtc, 2017-06-08 12:55:13]

lgtm

[sprang_webrtc, 2017-06-08 13:11:49]

The CQ bit was checked by sprang@webrtc.org

[commit-bot: I haz the power, 2017-06-08 13:12:01]

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, 2017-06-08 13:12:06]

CQ is committing da patch.

Bot data: {"patchset_id": 160001, "attempt_start_ts": 1496927509860830,
"parent_rev": "1066b1379df6bb8aa247457af83984364bb50cfe", "commit_rev":
"cdafeda1cb95ac49104b2cc5112bab8def863818"}

[commit-bot: I haz the power, 2017-06-08 13:12:10]

Description was changed from

==========
Reland of Periodically update codec bit/frame rate settings. (patchset #1 id:1
of https://codereview.webrtc.org/2923993002/ )

Reason for revert:
Create reland cl that we can patch with fix.

Original issue's description:
> Revert of Periodically update codec bit/frame rate settings. (patchset #8
id:140001 of https://codereview.webrtc.org/2883963002/ )
> 
> Reason for revert:
> Breaks some Call perf tests that are not run by the try bots....
> 
> Original issue's description:
> > Fix bug in vie_encoder.cc which caused channel parameters not to be updated
at regular intervals, as it was intended.
> > 
> > That however exposes a bunch of failed test, so this CL also fixed a few
other things:
> > * FakeEncoder should trust the configured FPS value rather than
guesstimating itself based on the realtime clock, so as not to completely
undershoot targets in offline mode. Also, compensate for key-frame overshoots
when outputting delta frames.
> > * FrameDropper should not assuming incoming frame rate is 0 if no frames
have been seen.
> > * Fix a bunch of test cases that started failing because they were relying
on the fake encoder undershooting.
> > * Fix test 
> > 
> > BUG=7664
> > 
> > Review-Url: https://codereview.webrtc.org/2883963002
> > Cr-Commit-Position: refs/heads/master@{#18473}
> > Committed:
https://chromium.googlesource.com/external/webrtc/+/6431e21da672a5f3bbf166d3d...
> 
> TBR=stefan@webrtc.org,holmer@google.com
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=7664
> 
> Review-Url: https://codereview.webrtc.org/2923993002
> Cr-Commit-Position: refs/heads/master@{#18475}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/5390c4814d7880ea79edcd555...

TBR=stefan@webrtc.org,holmer@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=7664
==========

to

==========
Reland of Periodically update codec bit/frame rate settings. (patchset #1 id:1
of https://codereview.webrtc.org/2923993002/ )

Reason for revert:
Create reland cl that we can patch with fix.

Original issue's description:
> Revert of Periodically update codec bit/frame rate settings. (patchset #8
id:140001 of https://codereview.webrtc.org/2883963002/ )
> 
> Reason for revert:
> Breaks some Call perf tests that are not run by the try bots....
> 
> Original issue's description:
> > Fix bug in vie_encoder.cc which caused channel parameters not to be updated
at regular intervals, as it was intended.
> > 
> > That however exposes a bunch of failed test, so this CL also fixed a few
other things:
> > * FakeEncoder should trust the configured FPS value rather than
guesstimating itself based on the realtime clock, so as not to completely
undershoot targets in offline mode. Also, compensate for key-frame overshoots
when outputting delta frames.
> > * FrameDropper should not assuming incoming frame rate is 0 if no frames
have been seen.
> > * Fix a bunch of test cases that started failing because they were relying
on the fake encoder undershooting.
> > * Fix test 
> > 
> > BUG=7664
> > 
> > Review-Url: https://codereview.webrtc.org/2883963002
> > Cr-Commit-Position: refs/heads/master@{#18473}
> > Committed:
https://chromium.googlesource.com/external/webrtc/+/6431e21da672a5f3bbf166d3d...
> 
> TBR=stefan@webrtc.org,holmer@google.com
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=7664
> 
> Review-Url: https://codereview.webrtc.org/2923993002
> Cr-Commit-Position: refs/heads/master@{#18475}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/5390c4814d7880ea79edcd555...

TBR=stefan@webrtc.org,holmer@google.com
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=7664

Review-Url: https://codereview.webrtc.org/2924023002
Cr-Commit-Position: refs/heads/master@{#18497}
Committed:
https://chromium.googlesource.com/external/webrtc/+/cdafeda1cb95ac49104b2cc51...
==========

[commit-bot: I haz the power, 2017-06-08 13:12:11]

Committed patchset #2 (id:160001) as
https://chromium.googlesource.com/external/webrtc/+/cdafeda1cb95ac49104b2cc51...

[sprang_webrtc, 2017-06-08 14:12:02]

A revert of this CL (patchset #2 id:160001) has been created in
https://codereview.webrtc.org/2926283002/ by sprang@webrtc.org.

The reason for reverting is: Looks like there's still one failing perf test:
RampUpTest.UpDownUpTransportSequenceNumberPacketLoss.