Reland of Adding PRESUBMIT check on google::protobuf (patchset #1 id:1 of https://codereview.webrtc.org/2791583002/ )

Reason for revert:
This should be landed after https://codereview.webrtc.org/2791963003.

Original issue's description:
> Revert of Adding PRESUBMIT check on google::protobuf (patchset #2 id:20001 of https://codereview.webrtc.org/2753823003/ )
>
> Reason for revert:
> We have to revert https://codereview.webrtc.org/2747863003 and this CL depends on it.
>
> Original issue's description:
> > Adding PRESUBMIT check on google::protobuf
> >
> > The goal is to avoid direct usage of google::protobuf.
> >
> > It should only be used with a 'using' directive in the header file:
> > //webrtc/base/protobuf_utils.h.
> >
> > BUG=webrtc:7340
> > NOTRY=True
> >
> > Review-Url: https://codereview.webrtc.org/2753823003
> > Cr-Commit-Position: refs/heads/master@{#17467}
> > Committed: https://chromium.googlesource.com/external/webrtc/+/dd27055cb78aa839659ed9e9f0656a265c285ae7
>
> TBR=kjellander@webrtc.org
> # Not skipping CQ checks because original CL landed more than 1 days ago.
> BUG=webrtc:7340
>
> Review-Url: https://codereview.webrtc.org/2791583002
> Cr-Commit-Position: refs/heads/master@{#17481}
> Committed: https://chromium.googlesource.com/external/webrtc/+/515dff40b711c70780612f2a4850e151a28bacde

TBR=kjellander@webrtc.org
# Not skipping CQ checks because original CL landed more than 1 days ago.
BUG=webrtc:7340

Review-Url: https://codereview.webrtc.org/2792103002
Cr-Commit-Position: refs/heads/master@{#17588}
1 file changed
tree: bf9e5dc843fceb646ca2b9c8517997ce4de7272d
  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. check_root_dir.py
  14. cleanup_links.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.

Development

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

More info