Revert of Refactor webrtc/modules/video_processing for GN check (patchset #3 id:40001 of https://codereview.webrtc.org/2595543002/ )

Reason for revert:
This CL broke some buildbots. I will investigate it later.

Original issue's description:
> Refactor webrtc/modules/video_processing for GN check
>
> This moves some GN check configurations out of .gn to individual
> targets.
>
> The now checked target is:
> "//webrtc/modules/video_processing/*"
>
> BUG=webrtc:6828
> NOTRY=True
>
> Review-Url: https://codereview.webrtc.org/2595543002
> Cr-Commit-Position: refs/heads/master@{#15732}
> Committed: https://chromium.googlesource.com/external/webrtc/+/00a810b844b2393b64f7e36ce1524dd9e3dccb4b

TBR=kjellander@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:6828

Review-Url: https://codereview.webrtc.org/2594973002
Cr-Commit-Position: refs/heads/master@{#15733}
2 files changed
tree: d2ecc11c48a84773daade858394ac988954aa4c6
  1. build_overrides/
  2. chromium/
  3. data/
  4. infra/
  5. resources/
  6. tools-webrtc/
  7. webrtc/
  8. .clang-format
  9. .git-blame-ignore-revs
  10. .gitignore
  11. .gn
  12. AUTHORS
  13. BUILD.gn
  14. check_root_dir.py
  15. codereview.settings
  16. DEPS
  17. LICENSE
  18. license_template.txt
  19. LICENSE_THIRD_PARTY
  20. OWNERS
  21. PATENTS
  22. PRESUBMIT.py
  23. pylintrc
  24. README.md
  25. setup_links.py
  26. sync_chromium.py
  27. 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. This page is maintained by the Google Chrome team.

Development

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

More info