Reland "[Stats] Move metric names to Attribute, constructed via AttributeInit."

This is a reland of commit 84c48ae7513bad9c9ca19271569cd0431e780c32

Original change's description:
> [Stats] Move metric names to Attribute, constructed via AttributeInit.
>
> As of this CL, Attribute no longer implements RTCStatsMemberInterface
> and a member no longer owns knowing its own name. The attribute knows
> the name because we pass it down at construction time.
>
> To achieve this, the WEBRTC_RTCSTATS_IMPL() macro is updated to take
> AttributeInits instead of raw member pointers, i.e. (name, ptr) pairs.
>
> By constructing RTCStatsMember<T> without a name parameter, it does the
> same thing as the absl::optional<T> constructor. So RTCStatsMember<T>'s
> days are numbered!
>
> Bug: webrtc:15164
> Change-Id: I560c0134bae1c2d7218426a1576425ecc1b677a7
> Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/334203
> Commit-Queue: Henrik Boström <hbos@webrtc.org>
> Reviewed-by: Evan Shrubsole <eshr@google.com>
> Cr-Commit-Position: refs/heads/main@{#41540}

Bug: webrtc:15164
Change-Id: I28f3d588004ff185e5820347ad9513f2f7a6cc66
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/335020
Auto-Submit: Mirko Bonadei <mbonadei@webrtc.org>
Commit-Queue: Henrik Boström <hbos@webrtc.org>
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Henrik Boström <hbos@webrtc.org>
Cr-Commit-Position: refs/heads/main@{#41556}
11 files changed
tree: 5a96a7f2c507b3567c8e3a2973cdd9c2ee241c39
  1. api/
  2. audio/
  3. build_overrides/
  4. call/
  5. common_audio/
  6. common_video/
  7. data/
  8. docs/
  9. examples/
  10. experiments/
  11. g3doc/
  12. infra/
  13. logging/
  14. media/
  15. modules/
  16. net/
  17. p2p/
  18. pc/
  19. resources/
  20. rtc_base/
  21. rtc_tools/
  22. sdk/
  23. stats/
  24. system_wrappers/
  25. test/
  26. tools_webrtc/
  27. video/
  28. .clang-format
  29. .git-blame-ignore-revs
  30. .gitignore
  31. .gn
  32. .mailmap
  33. .style.yapf
  34. .vpython
  35. .vpython3
  36. AUTHORS
  37. BUILD.gn
  38. CODE_OF_CONDUCT.md
  39. codereview.settings
  40. DEPS
  41. DIR_METADATA
  42. ENG_REVIEW_OWNERS
  43. LICENSE
  44. license_template.txt
  45. native-api.md
  46. OWNERS
  47. OWNERS_INFRA
  48. PATENTS
  49. PRESUBMIT.py
  50. presubmit_test.py
  51. presubmit_test_mocks.py
  52. pylintrc
  53. pylintrc_old_style
  54. README.chromium
  55. README.md
  56. WATCHLISTS
  57. webrtc.gni
  58. webrtc_lib_link_test.cc
  59. whitespace.txt
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 here for instructions on how to get started developing with the native code.

Authoritative list of directories that contain the native API header files.

More info