Reland "Add CI testers for ozone/x11/wayland/headless"

This is a reland of 5e3d35be10179f00329467b93bdc81ce0719de2d

Original change's description:
> Add CI testers for ozone/x11/wayland/headless
>
> We have a linux-ozone-rel bot on the CQ, but we also need a CI
> testers with Ozone/X11/Wayland/Headless.
>
> Bug: 1142753
> Change-Id: I5977cdf48c95430044e448b22aefdf0d3f099eb1
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/build/+/2501461
> Reviewed-by: Dirk Pranke <dpranke@google.com>
> Commit-Queue: Maksim Sisov (GMT+2) <msisov@igalia.com>

Bug: 1142753
Change-Id: I43903cc32b4443fd835207adab482e0da5076af7
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/build/+/2529145
Reviewed-by: Dirk Pranke <dpranke@google.com>
Commit-Queue: Maksim Sisov (GMT+2) <msisov@igalia.com>
1 file changed
tree: d4b1d96f318b6ff7e4c8e6f82c063acbf2dea049
  1. infra/
  2. recipes/
  3. scripts/
  4. site_config/
  5. third_party/
  6. .gitattributes
  7. .gitignore
  8. .style.yapf
  9. .vpython
  10. .yapfignore
  11. codereview.settings
  12. CROS_OWNERS
  13. DEPS
  14. environment.cfg.py
  15. LICENSE
  16. OWNERS
  17. PRESUBMIT.py
  18. README.md
  19. WATCHLISTS
README.md

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.

Style

The preferred style is PEP8 with two-space indent; that is, the Chromium Python style. Functions use lowercase_with_underscores, with the exception of the special functions RunSteps and RunTests in recipes. Use yapf (git cl format --no-clang-format) to autoformat new code.