Reland of Stop silently accepting unsupported flags in test binaries (patchset #1 id:1 of https://codereview.webrtc.org/3002963002/ )

Reason for revert:
Relanding without changes.
Problem with unused flags was fixed in
https://codereview.webrtc.org/2998143002/

Original issue's description:
> Revert of Stop silently accepting unsupported flags in test binaries (patchset #5 id:150001 of https://codereview.webrtc.org/2968003003/ )
>
> Reason for revert:
> Causes failures on perf bots
> https://luci-milo.appspot.com/buildbot/client.webrtc.perf/Mac%2010.11/3567
>
> Original issue's description:
> > Stop silently accepting unsupported flags in test binaries
> >
> > Instead explicitly ignore only the flags we know should be ignored.
> >
> > BUG=webrtc:7568
> >
> > Review-Url: https://codereview.webrtc.org/2968003003
> > Cr-Commit-Position: refs/heads/master@{#19412}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/a2782f6f5d350e423b8166d603f44e17e1d7540b
>
> TBR=kjellander@webrtc.org,henrika@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:7568
>
> Review-Url: https://codereview.webrtc.org/3002963002
> Cr-Commit-Position: refs/heads/master@{#19413}
> Committed: https://chromium.googlesource.com/external/webrtc/+/d64072c598875cdf3a8ce5806d3410125363596d

TBR=kjellander@webrtc.org,henrika@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7568

Review-Url: https://codereview.webrtc.org/2999383002
Cr-Commit-Position: refs/heads/master@{#19455}
5 files changed
tree: cb4c6d7d0b9a1298b0377cba3f9ca6eca8c23cb5
  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