Fix perf results upload.

Starting from [1], //third_party/protobuf has been updated to 3.13.0
and this introduces a breaking change which breaks WebRTC's perf results
upload (see bugs.webrtc.org/12211).

Error:

File [..]/tracing/proto/histogram_proto.py", line 9, in <module>
    import histogram_pb2  # pylint:disable=relative-import
  File "[..]/tracing/proto/histogram_pb2.py", line 22, in <module>
    create_key=_descriptor._internal_create_key,
AttributeError: 'module' object has no attribute '_internal_create_key'

It looks like vpython is not able to load the wheel from the vpython
environment if the import happens in the "from ... import ..." form
while it works if the library is pre-imported with "import ...".

[1] - https://chromium-review.googlesource.com/c/chromium/src/+/2545204

No-Try: True
No-Presubmit: True
Bug: webrtc:12211
Change-Id: Id3e365eb9d4c4c31bcd4dcfab7db700e0e6e00b2
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/195000
Commit-Queue: Mirko Bonadei <mbonadei@webrtc.org>
Reviewed-by: Andrey Logvin <landrey@webrtc.org>
Cr-Commit-Position: refs/heads/master@{#32677}
2 files changed
tree: 596bae2f4488e0df1cef5106551bf279e7ca0921
  1. api/
  2. audio/
  3. build_overrides/
  4. call/
  5. common_audio/
  6. common_video/
  7. data/
  8. docs/
  9. examples/
  10. logging/
  11. media/
  12. modules/
  13. p2p/
  14. pc/
  15. resources/
  16. rtc_base/
  17. rtc_tools/
  18. sdk/
  19. stats/
  20. style-guide/
  21. system_wrappers/
  22. test/
  23. tools_webrtc/
  24. video/
  25. .clang-format
  26. .git-blame-ignore-revs
  27. .gitignore
  28. .gn
  29. .vpython
  30. abseil-in-webrtc.md
  31. AUTHORS
  32. BUILD.gn
  33. CODE_OF_CONDUCT.md
  34. codereview.settings
  35. DEPS
  36. ENG_REVIEW_OWNERS
  37. LICENSE
  38. license_template.txt
  39. native-api.md
  40. OWNERS
  41. PATENTS
  42. PRESUBMIT.py
  43. presubmit_test.py
  44. presubmit_test_mocks.py
  45. pylintrc
  46. README.chromium
  47. README.md
  48. style-guide.md
  49. WATCHLISTS
  50. webrtc.gni
  51. webrtc_lib_link_test.cc
  52. 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