Revert "Experiment 5% run Lacros related tests on linux-chromeos-rel"

This reverts commit 91374e2ba2d994c96183d64b2aa870cebe8dee0e.

Reason for revert: Start having issues on CQ. So enable on CI back
first allowing me debug further.
I locally tested. With CI gn args tests can pass. But with CQ gn args,
tests are crashed.

Original change's description:
> Experiment 5% run Lacros related tests on linux-chromeos-rel
>
> This will build Lacros without experimental on the builder.
> The test suite will run at 5% experiment.
> The builder resource was approved in crbug.com/1233066.
> The test resource was approved in crbug.com/1287287.
> Flakiness comparison:
> browser_tests: https://data.corp.google.com/sites/chrome_generic_flakiness_dashboard_datasite/flake_report/?f=variant_builder:in:linux-chromeos-rel&f=realm:in:chromium:ci&f=variant_test_suite:in:browser_tests
> browser_tests_require_lacros: https://data.corp.google.com/sites/chrome_generic_flakiness_dashboard_datasite/flake_report/?f=variant_builder:in:linux-chromeos-rel&f=realm:in:chromium:ci&f=variant_test_suite:in:browser_tests_require_lacros
> This target has higher percentage of flake tests, but the
> absolute number of flake tests is much lower.
>
> Bug: 1287287
> Change-Id: Id6899f271177b01e69e383a8206ff69db4d48c3a
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3597209
> Reviewed-by: Gary Tong <gatong@chromium.org>
> Commit-Queue: Sven Zheng <svenzheng@chromium.org>
> Cr-Commit-Position: refs/heads/main@{#994856}

Bug: 1287287
Change-Id: I467d6fd02780395bfccaec99c1f63a93eee3cbad
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/3630503
Auto-Submit: Sven Zheng <svenzheng@chromium.org>
Reviewed-by: Gary Tong <gatong@chromium.org>
Commit-Queue: Gary Tong <gatong@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1000238}
NOKEYCHECK=True
GitOrigin-RevId: 2ee638e14a7fc7232a004a59fa19fb83b7b0d78e
2 files changed
tree: 13bb300f8556215655bdf67c3c3af1a7fbc9f898
  1. docs/
  2. lib/
  3. mb_config_expectations/
  4. __init__.py
  5. DIR_METADATA
  6. mb
  7. mb.bat
  8. mb.py
  9. mb_config.pyl
  10. mb_unittest.py
  11. mb_validation_unittest.py
  12. OWNERS
  13. PRESUBMIT.py
  14. PRESUBMIT_test.py
  15. README.md
  16. rts_banned_suites.json
README.md

MB - The Meta-Build wrapper

MB is a simple wrapper around the GN build tool.

It was originally written as part of the GYP->GN migration, in order to provide a uniform interface to either GYP or GN, such that users and bots can call one script and not need to worry about whether a given bot was meant to use GN or GYP.

It eventually grew additional functionality and is now still used even though everything is GN-only.

It supports two main functions:

  1. “gen” - the main gn gen invocation that generates the Ninja files needed for the build.

  2. “analyze” - the step that takes a list of modified files and a list of desired targets and reports which targets will need to be rebuilt.

We also use MB as a forcing function to collect all of the different build configurations that we actually support for Chromium builds into one place, in //tools/mb/mb_config.pyl.

For more information, see: