Reland of Enable spec-compliant algorithm for MediaStream video constraints by default

Reland of Enable spec-compliant algorithm for MediaStream video constraints by default (patchset #1 id:1 of https://codereview.chromium.org/2810913007/ )

Reason for revert:
The defaults were changed to the same as the old algorithm in subsequent patches.

Original issue's description:
> Revert of Enable spec-compliant algorithm for MediaStream video constraints by default (patchset #2 id:40001 of https://codereview.chromium.org/2793053002/ )
> 
> Reason for revert:
> Regressed performance_browser_tests 21-93% (see crbug.com/710187). Suspect that chrome.tabCapture extension API is providing constraints in the legacy format, and this feature switch is causing bad defaults to be used instead.
> 
> 
> Original issue's description:
> > Enable spec-compliant algorithm for MediaStream video constraints by default
> > 
> > BUG=657733
> > 
> > Review-Url: https://codereview.chromium.org/2793053002
> > Cr-Commit-Position: refs/heads/master@{#462575}
> > Committed: https://chromium.googlesource.com/chromium/src/+/73d1c7107a41b474c6fed9292ff41f7ce3429a42
> 
> TBR=avi@chromium.org,stkhapugin@chromium.org,guidou@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=657733
> 
> Review-Url: https://codereview.chromium.org/2810913007
> Cr-Commit-Position: refs/heads/master@{#463913}
> Committed: https://chromium.googlesource.com/chromium/src/+/8f48e5edcd8494a2b8ec8e45c49eecf7039feb08

TBR=avi@chromium.org,stkhapugin@chromium.org,miu@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=657733

[Guido Urdaneta, 2017-04-12 03:29:11]

The CQ bit was checked by guidou@chromium.org

[Guido Urdaneta, 2017-04-12 03:29:11]

Created Reland of Enable spec-compliant algorithm for MediaStream video
constraints by default

[commit-bot: I haz the power, 2017-04-12 03:29:37]

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

[Guido Urdaneta, 2017-04-12 03:29:53]

The CQ bit was unchecked by guidou@chromium.org

[commit-bot: I haz the power, 2017-04-12 03:31:18]

CQ is committing da patch.

Bot data: {"patchset_id": 1, "attempt_start_ts": 1491967751367670, "parent_rev":
"b17dcbb4a02e13074725817d39bbebf0c6a92677", "commit_rev":
"8bc11efe0ad6275747cb848e083051409b5144b2"}

[Guido Urdaneta, 2017-04-12 07:05:06]

Description was changed from

==========
Reland of Enable spec-compliant algorithm for MediaStream video constraints by
default (patchset #1 id:1 of https://codereview.chromium.org/2810913007/ )

Reason for revert:
The defaults were changed to the same as the old algorithm in subsequent
patches.

Original issue's description:
> Revert of Enable spec-compliant algorithm for MediaStream video constraints by
default (patchset #2 id:40001 of https://codereview.chromium.org/2793053002/ )
> 
> Reason for revert:
> Regressed performance_browser_tests 21-93% (see crbug.com/710187). Suspect
that chrome.tabCapture extension API is providing constraints in the legacy
format, and this feature switch is causing bad defaults to be used instead.
> 
> 
> Original issue's description:
> > Enable spec-compliant algorithm for MediaStream video constraints by default
> > 
> > BUG=657733
> > 
> > Review-Url: https://codereview.chromium.org/2793053002
> > Cr-Commit-Position: refs/heads/master@{#462575}
> > Committed:
https://chromium.googlesource.com/chromium/src/+/73d1c7107a41b474c6fed9292ff4...
> 
> TBR=avi@chromium.org,stkhapugin@chromium.org,guidou@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=657733
> 
> Review-Url: https://codereview.chromium.org/2810913007
> Cr-Commit-Position: refs/heads/master@{#463913}
> Committed:
https://chromium.googlesource.com/chromium/src/+/8f48e5edcd8494a2b8ec8e45c49e...

TBR=avi@chromium.org,stkhapugin@chromium.org,miu@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=657733
==========

to

==========
Reland of Enable spec-compliant algorithm for MediaStream video constraints by
default (patchset #1 id:1 of https://codereview.chromium.org/2810913007/ )

Reason for revert:
The defaults were changed to the same as the old algorithm in subsequent
patches.

Original issue's description:
> Revert of Enable spec-compliant algorithm for MediaStream video constraints by
default (patchset #2 id:40001 of https://codereview.chromium.org/2793053002/ )
> 
> Reason for revert:
> Regressed performance_browser_tests 21-93% (see crbug.com/710187). Suspect
that chrome.tabCapture extension API is providing constraints in the legacy
format, and this feature switch is causing bad defaults to be used instead.
> 
> 
> Original issue's description:
> > Enable spec-compliant algorithm for MediaStream video constraints by default
> > 
> > BUG=657733
> > 
> > Review-Url: https://codereview.chromium.org/2793053002
> > Cr-Commit-Position: refs/heads/master@{#462575}
> > Committed:
https://chromium.googlesource.com/chromium/src/+/73d1c7107a41b474c6fed9292ff4...
> 
> TBR=avi@chromium.org,stkhapugin@chromium.org,guidou@chromium.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=657733
> 
> Review-Url: https://codereview.chromium.org/2810913007
> Cr-Commit-Position: refs/heads/master@{#463913}
> Committed:
https://chromium.googlesource.com/chromium/src/+/8f48e5edcd8494a2b8ec8e45c49e...

TBR=avi@chromium.org,stkhapugin@chromium.org,miu@chromium.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=657733
==========

[Guido Urdaneta, 2017-04-12 07:35:39]

This landed accidentally, but was reverted again in
https://codereview.chromium.org/2810143002/