Reland of Allow custom metrics implementations on Android. (patchset #1 id:1 of https://codereview.webrtc.org/2516403002/ )

Reason for revert:
Fix downstream.

Original issue's description:
> Revert of Allow custom metrics implementations on Android. (patchset #11 id:260001 of https://codereview.webrtc.org/2403463002/ )
>
> Reason for revert:
> Break downstream tests.
>
> Original issue's description:
> > Allow custom metrics implementations on Android.
> >
> > BUG=webrtc:6499
> >
> > Committed: https://crrev.com/de609b26c5fc77fd3388eae5594ee8a634edf8da
> > Cr-Commit-Position: refs/heads/master@{#15169}
>
> TBR=kjellander@webrtc.org,magjed@webrtc.org,sakal@webrtc.org
> # Skipping CQ checks because original CL landed less than 1 days ago.
> NOPRESUBMIT=true
> NOTREECHECKS=true
> NOTRY=true
> BUG=webrtc:6499
>
> Committed: https://crrev.com/f570a2804ed8af6f6586f4aea51e089bd55d7e42
> Cr-Commit-Position: refs/heads/master@{#15171}

TBR=kjellander@webrtc.org,magjed@webrtc.org,philipel@webrtc.org
BUG=webrtc:6499

Review-Url: https://codereview.webrtc.org/2518293002
Cr-Commit-Position: refs/heads/master@{#15214}
14 files changed
tree: 0ba7b755c0b2f933fdbc07f288d4cd3904674bee
  1. build_overrides/
  2. chromium/
  3. data/
  4. infra/
  5. resources/
  6. third_party/
  7. tools/
  8. webrtc/
  9. .clang-format
  10. .git-blame-ignore-revs
  11. .gitignore
  12. .gn
  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