Revert of Turn off error resilience for VP9 if no spatial or temporal layers are configured and NACK is enabl… (patchset #2 id:20001 of https://codereview.webrtc.org/2925253002/ )

Reason for revert:
Failing WebRtcVideoQualityBrowserTest.MANUAL_TestVideoQualityVp* tests.

Mac #19383-19392
https://build.chromium.org/p/chromium.webrtc.fyi/builders/Mac%20Tester/builds/42197
Win8 #19383-19385
https://build.chromium.org/p/chromium.webrtc.fyi/builders/Win8%20Tester/builds/1496
Win7 #19383-19385
https://build.chromium.org/p/chromium.webrtc.fyi/builders/Win7%20Tester/builds/9807
Win10 #19383-19385
https://build.chromium.org/p/chromium.webrtc.fyi/builders/Win10%20Tester/builds/8452

Original issue's description:
> Turn off error resilience for VP9 if no spatial or temporal layers are configured and NACK is enabled.
>
> Error resilience is currently always enabled for VP9 which reduces quality.
>
> Reland of https://codereview.webrtc.org/2532053002
>
> BUG=webrtc:6783
>
> Review-Url: https://codereview.webrtc.org/2925253002
> Cr-Commit-Position: refs/heads/master@{#19385}
> Committed: https://chromium.googlesource.com/external/webrtc/+/6b463faccbf145b54b8fb2666bfeab868256df08

TBR=brandtr@webrtc.org,asapersson@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6783

Review-Url: https://codereview.webrtc.org/2995173002
Cr-Commit-Position: refs/heads/master@{#19399}
2 files changed
tree: cd3fe10259ba99afe73862e629a5d1e07d54254f
  1. build_overrides/
  2. data/
  3. infra/
  4. resources/
  5. tools_webrtc/
  6. webrtc/
  7. .clang-format
  8. .git-blame-ignore-revs
  9. .gitignore
  10. .gn
  11. AUTHORS
  12. BUILD.gn
  13. CODE_OF_CONDUCT.md
  14. codereview.settings
  15. DEPS
  16. LICENSE
  17. license_template.txt
  18. LICENSE_THIRD_PARTY
  19. OWNERS
  20. PATENTS
  21. PRESUBMIT.py
  22. pylintrc
  23. README.md
  24. WATCHLISTS
README.md

WebRTC is a free, open software project that provides browsers and mobile applications with Real-Time Communications (RTC) capabilities via simple APIs. The WebRTC components have been optimized to best serve this purpose.

Our mission: To enable rich, high-quality RTC applications to be developed for the browser, mobile platforms, and IoT devices, and allow them all to communicate via a common set of protocols.

The WebRTC initiative is a project supported by Google, Mozilla and Opera, amongst others.

Development

See http://www.webrtc.org/native-code/development for instructions on how to get started developing with the native code.

More info