Reland "WebRTC: Isolate all targets for triggered testers, not just the current suite."

This is a reland of 4a2039d56dc6854475acfeba0605d6658311c4c9

Original change's description:
> WebRTC: Isolate all targets for triggered testers, not just the current suite.
>
> Download quality tools on the builder because that's what uploads to swarming.
> Also compile perf-related targets on the Android builders because they're required for isolation.
>
> Bug: chromium:908001
> Change-Id: Ieb68f72f82dec0e819ce356ebfcb94665abc3f60
> Reviewed-on: https://chromium-review.googlesource.com/c/1350857
> Commit-Queue: Oleh Prypin <oprypin@chromium.org>
> Reviewed-by: Patrik Höglund <phoglund@chromium.org>

Bug: chromium:908001
Change-Id: I78f73a2d39e815eaf6019ad7ad7be0a64fdc0064
Reviewed-on: https://chromium-review.googlesource.com/c/1360333
Commit-Queue: Oleh Prypin <oprypin@chromium.org>
Reviewed-by: John Budorick <jbudorick@chromium.org>
15 files changed
tree: 8307f3b0c186dfd0027ee789b3dcc7be81d959ba
  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.