[js-code-coverage] Import json library

In CL:2550516 added loading the monorail components but forgot to import
the json library.

Bug: 1113941
Test: ./recipes.py test run
Test: ./generate_coverage_metadata_for_javascript_test.py
Test: python generate_coverage_metadata_for_javascript.py \
	--src-path chromium/src \
	--coverage-dir chromium/src/out/Default/devtools_code_coverage \
	--dir-metadata-path component_mapping \
	--output-dir none
Change-Id: Ibd3996c101a8f32304dc7edc916d3c93a4b5cbcb
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/build/+/2558595
Auto-Submit: Ben Reich <benreich@chromium.org>
Commit-Queue: Zhaoyang Li <zhaoyangli@chromium.org>
Reviewed-by: Zhaoyang Li <zhaoyangli@chromium.org>
1 file changed
tree: 68b118c95f659d537e0ecd6e4317b6e2db84b3ed
  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.