Revert "Remove --isolated-script-test-perf-output from chromium recipe."

This reverts commit 98cb0022b0e4f2c6b05a23b31bfe532ed9924885.

Reason for revert:
This is a speculative revert. This could fail
rendering_representative_perf_tests on mac-rel bot:
https://ci.chromium.org/p/chromium/builders/try/mac-rel/486009

The failure started at almost the same time with the CL.

Original change's description:
> Remove --isolated-script-test-perf-output from chromium recipe.
> 
> As discovered/discussed in crbug.com/1127545, it appears that this
> flag is not actually ever used anywhere in the chromium recipes.
> 
> Perf tests *do* produce output, but they don't use this flag to
> do so.
> 
> WebRTC tests *do* use this flag, but they set this directly in their
> own recipes.
> 
> Bug: 1127545
> Change-Id: I215ad8f698c18e41ca2a87c7043371a9ac73000b
> Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/build/+/2427305
> Reviewed-by: Stephen Martinis <martiniss@chromium.org>
> Commit-Queue: Dirk Pranke <dpranke@google.com>

TBR=dpranke@google.com,martiniss@chromium.org,infra-scoped@luci-project-accounts.iam.gserviceaccount.com

Change-Id: I5098761439414a8d26010ec838b6ea6ca41dd8df
No-Presubmit: true
No-Tree-Checks: true
No-Try: true
Bug: 1127545
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/build/+/2426074
Reviewed-by: Takuto Ikuta <tikuta@chromium.org>
Commit-Queue: Takuto Ikuta <tikuta@chromium.org>
67 files changed
tree: 5c55c96dbf7b4b43e79c487e12a82d9336d56b29
  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.