Reland of Refactor webrtc/modules/desktop_capture for GN check

Reason for revert:
Trying to reland this CL.

Original issue's description:
> Revert of Refactor webrtc/modules/desktop_capture for GN check (patchset #1 id:1 of https://codereview.webrtc.org/2593713002/ )
>
> Reason for revert:
> Apparently breaks Chromium compile for unknown reason:
> https://build.chromium.org/p/chromium.webrtc.fyi/builders/Linux%20Builder/builds/12314
>
> Original issue's description:
> > Refactor webrtc/modules/desktop_capture for GN check
> >
> > This moves some GN check configurations out of .gn to individual
> > targets.
> >
> > The now checked target is:
> > "//webrtc/modules/desktop_capture/*"
> >
> > BUG=webrtc:6828
> > NOTRY=True
> >
> > Review-Url: https://codereview.webrtc.org/2593713002
> > Cr-Commit-Position: refs/heads/master@{#15725}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/70870b921148fdc10d1131958a03d45f0f83f6fa
>
> TBR=sergeyu@chromium.org,mbonadei@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/2597923002
> Cr-Commit-Position: refs/heads/master@{#15750}
> Committed: https://chromium.googlesource.com/external/webrtc/+/d943c4845439aab311212b881d05ca0f2bb493f8

TBR=sergeyu@chromium.org,kjellander@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:6828

Review-Url: https://codereview.webrtc.org/2609523002
Cr-Commit-Position: refs/heads/master@{#15832}
4 files changed
tree: b6f21a8d8d78c4e74db70128e356a63f42e2139d
  1. build_overrides/
  2. data/
  3. infra/
  4. ios/
  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. 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