Reland "WebRTC: Dowload quality measuring tools only if needed"

This is a reland of f15d03b241df6036fca7426af631ae7a91d26bd6

Isolate is fixed in https://webrtc-review.googlesource.com/c/src/+/62660

Original change's description:
> WebRTC: Dowload quality measuring tools only if needed
>
> These are only used in performance tests and never for building
>
> Bug: chromium:755660, chromium:749655
> Change-Id: I89f2850a22fc4bd2a03eb285047cd5ed1c3a9f4b
> Reviewed-on: https://chromium-review.googlesource.com/960023
> Reviewed-by: Patrik Höglund <phoglund@chromium.org>
> Reviewed-by: Michael Achenbach <machenbach@chromium.org>
> Commit-Queue: Oleh Prypin <oprypin@chromium.org>

Bug: chromium:755660, chromium:749655
Change-Id: If07e6a27aeadb7ff199e042ed3d04e2051b43bb3
Reviewed-on: https://chromium-review.googlesource.com/963424
Commit-Queue: Oleh Prypin <oprypin@chromium.org>
Reviewed-by: Michael Achenbach <machenbach@chromium.org>
Reviewed-by: Patrik Höglund <phoglund@chromium.org>
80 files changed
tree: a1c60cfce437b39f23a0a729750c281dbc533bb3
  1. infra/
  2. masters/
  3. scripts/
  4. site_config/
  5. slave/
  6. tests/
  7. third_party/
  8. .gitattributes
  9. .gitignore
  10. .vpython
  11. codereview.settings
  12. DEPS
  13. environment.cfg.py
  14. LICENSE
  15. OWNERS
  16. PRESUBMIT.py
  17. README.md
  18. WATCHLISTS
README.md

build

Hi build contributor! If you do any change in scripts/master/ or touching any master's html/ directories, you must restart master.chromium.fyi first and ensure that it still works before restarting other masters.

Recipes

If you're here to make a change to ‘recipes’ (the code located in scripts/slave/recipes*), please take a look at the README for more information pertaining to recipes.