Reland of Properly report number of quality downscales in stats.

Reland of Properly report number of quality downscales in stats. (patchset #1 id:1 of https://codereview.webrtc.org/2586783003/ )

Reason for revert:
Bug affecting perf tests has been fixed. The issue was that I had accidentally disabled cpu overuse adaptation based on the encoders ScalingSettings, not just quality-based scaling.

Original issue's description:
> Revert of Properly report number of quality downscales in stats. (patchset #11 id:220001 of https://codereview.webrtc.org/2564373002/ )
> 
> Reason for revert:
> Breaks perf tests
> 
> Original issue's description:
> > Properly report number of quality downscales in stats.
> > 
> > A regression was introduced in 876222f that caused these stats to
> > be reported incorrectly. This used to be only implemented for VP8
> > but should now be available for all codecs.
> > 
> > BUG=webrtc:6860
> > 
> > Review-Url: https://codereview.webrtc.org/2564373002
> > Cr-Commit-Position: refs/heads/master@{#15673}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/0c8c5388355f5df085595d9ea24fa38995708120
> 
> TBR=asapersson@webrtc.org,stefan@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:6860
> 
> Review-Url: https://codereview.webrtc.org/2586783003
> Cr-Commit-Position: refs/heads/master@{#15678}
> Committed: https://chromium.googlesource.com/external/webrtc/+/fe04bd43cc7a7d45ce59a2a83d716a68d06b5e92

TBR=asapersson@webrtc.org,stefan@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6860
Review-Url: https://codereview.webrtc.org/2588743002
Cr-Commit-Position: refs/heads/master@{#15680}
Committed: https://chromium.googlesource.com/external/webrtc/+/0cd27ba088766b7822df1bfe7c21c3dfd57d368c

[kthelgason, 2016-12-19 14:31:34]

Created Reland of Properly report number of quality downscales in stats.

[kthelgason, 2016-12-19 14:32:07]

The CQ bit was checked by kthelgason@webrtc.org

[commit-bot: I haz the power, 2016-12-19 14:32:11]

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

[kthelgason, 2016-12-19 14:32:13]

The CQ bit was unchecked by kthelgason@webrtc.org

[commit-bot: I haz the power, 2016-12-19 14:32:16]

CQ is committing da patch.

Bot data: {"patchset_id": 180001, "attempt_start_ts": 1482157927873760,
"parent_rev": "8c1dd8d32f72893efc644c5f08f7001fccda9415", "commit_rev":
"0cd27ba088766b7822df1bfe7c21c3dfd57d368c"}

[commit-bot: I haz the power, 2016-12-19 14:32:20]

Description was changed from

==========
Reland of Properly report number of quality downscales in stats. (patchset #1
id:1 of https://codereview.webrtc.org/2586783003/ )

Reason for revert:
Bug affecting perf tests has been fixed. The issue was that I had accidentally
disabled cpu overuse adaptation based on the encoders ScalingSettings, not just
quality-based scaling.

Original issue's description:
> Revert of Properly report number of quality downscales in stats. (patchset #11
id:220001 of https://codereview.webrtc.org/2564373002/ )
> 
> Reason for revert:
> Breaks perf tests
> 
> Original issue's description:
> > Properly report number of quality downscales in stats.
> > 
> > A regression was introduced in 876222f that caused these stats to
> > be reported incorrectly. This used to be only implemented for VP8
> > but should now be available for all codecs.
> > 
> > BUG=webrtc:6860
> > 
> > Review-Url: https://codereview.webrtc.org/2564373002
> > Cr-Commit-Position: refs/heads/master@{#15673}
> > Committed:
https://chromium.googlesource.com/external/webrtc/+/0c8c5388355f5df085595d9ea...
> 
> TBR=asapersson@webrtc.org,stefan@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:6860
> 
> Review-Url: https://codereview.webrtc.org/2586783003
> Cr-Commit-Position: refs/heads/master@{#15678}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/fe04bd43cc7a7d45ce59a2a83...

TBR=asapersson@webrtc.org,stefan@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6860
==========

to

==========
Reland of Properly report number of quality downscales in stats. (patchset #1
id:1 of https://codereview.webrtc.org/2586783003/ )

Reason for revert:
Bug affecting perf tests has been fixed. The issue was that I had accidentally
disabled cpu overuse adaptation based on the encoders ScalingSettings, not just
quality-based scaling.

Original issue's description:
> Revert of Properly report number of quality downscales in stats. (patchset #11
id:220001 of https://codereview.webrtc.org/2564373002/ )
> 
> Reason for revert:
> Breaks perf tests
> 
> Original issue's description:
> > Properly report number of quality downscales in stats.
> > 
> > A regression was introduced in 876222f that caused these stats to
> > be reported incorrectly. This used to be only implemented for VP8
> > but should now be available for all codecs.
> > 
> > BUG=webrtc:6860
> > 
> > Review-Url: https://codereview.webrtc.org/2564373002
> > Cr-Commit-Position: refs/heads/master@{#15673}
> > Committed:
https://chromium.googlesource.com/external/webrtc/+/0c8c5388355f5df085595d9ea...
> 
> TBR=asapersson@webrtc.org,stefan@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:6860
> 
> Review-Url: https://codereview.webrtc.org/2586783003
> Cr-Commit-Position: refs/heads/master@{#15678}
> Committed:
https://chromium.googlesource.com/external/webrtc/+/fe04bd43cc7a7d45ce59a2a83...

TBR=asapersson@webrtc.org,stefan@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6860

Review-Url: https://codereview.webrtc.org/2588743002
Cr-Commit-Position: refs/heads/master@{#15680}
Committed:
https://chromium.googlesource.com/external/webrtc/+/0cd27ba088766b7822df1bfe7...
==========

[commit-bot: I haz the power, 2016-12-19 14:32:21]

Committed patchset #2 (id:180001) as
https://chromium.googlesource.com/external/webrtc/+/0cd27ba088766b7822df1bfe7...