Reland of Unify the macOS and iOS capturer implementations (patchset #1 id:1 of https://codereview.webrtc.org/2381853002/ )

Reason for revert:
Internal project has been fixed

Original issue's description:
> Revert of Unify the macOS and iOS capturer implementations (patchset #4 id:60001 of https://codereview.webrtc.org/2309253005/ )
>
> Reason for revert:
> Breaks internal project
>
> Original issue's description:
> > Unify the macOS and iOS capturer implementations
> >
> > This removes the QTKit based capturer for mac, and removes the need
> > to link against deprecated system libraries on macOS.
> >
> > BUG=webrtc:3968,webrtc:6275,webrtc:6333
> >
> > Committed: https://crrev.com/242d8bdddd77109781cbb70c59d161be7566ac98
> > Cr-Commit-Position: refs/heads/master@{#14418}
>
> TBR=magjed@webrtc.org,tkchin@webrtc.org,perkj@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:3968,webrtc:6275,webrtc:6333
>
> Committed: https://crrev.com/eddb7571d81e51a66f4abaf55013c85b4132c837
> Cr-Commit-Position: refs/heads/master@{#14429}

TBR=magjed@webrtc.org,tkchin@webrtc.org,perkj@webrtc.org
# Skipping CQ checks because original CL landed less than 1 days ago.
NOPRESUBMIT=true
NOTREECHECKS=true
NOTRY=true
BUG=webrtc:3968,webrtc:6275,webrtc:6333

Review-Url: https://codereview.webrtc.org/2375273004
Cr-Commit-Position: refs/heads/master@{#14451}
20 files changed
tree: 338f48873f614476900a9fa510be1fbfd46c1cf9
  1. build_overrides/
  2. chromium/
  3. data/
  4. infra/
  5. resources/
  6. third_party/
  7. tools/
  8. webrtc/
  9. .clang-format
  10. .gitignore
  11. .gn
  12. all.gyp
  13. AUTHORS
  14. BUILD.gn
  15. check_root_dir.py
  16. codereview.settings
  17. DEPS
  18. LICENSE
  19. license_template.txt
  20. LICENSE_THIRD_PARTY
  21. OWNERS
  22. PATENTS
  23. PRESUBMIT.py
  24. pylintrc
  25. README.md
  26. setup_links.py
  27. sync_chromium.py
  28. 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