ui: Add eslint

tslint is deprecated (more over it's started printing worrying errors
when running). The suggested upgrade path is eslint. This installs
eslint and adds the Google style guide rules. Currently
  git cl format --js
and
  eslint
disagree on the indentation so that will have to be resolved before we
switch over to eslint entirely.

I ran:
ui/eslint --fix src/frontend/aggregation_panel.ts
so the diff in src/frontend/aggregation_panel.ts is an an example of
some of the issues eslint found in the code base.

Change-Id: I3584f2701b89172d0b13500edfa124b1324c0381
5 files changed
tree: 32655a3d6b41f94222eb19c7a756de62f6e125f6
  1. .github/
  2. bazel/
  3. build_overrides/
  4. buildtools/
  5. debian/
  6. docs/
  7. examples/
  8. gn/
  9. include/
  10. infra/
  11. protos/
  12. python/
  13. src/
  14. test/
  15. tools/
  16. ui/
  17. .clang-format
  18. .clang-tidy
  19. .gitattributes
  20. .gitignore
  21. .gn
  22. .style.yapf
  23. Android.bp
  24. Android.bp.extras
  25. BUILD
  26. BUILD.extras
  27. BUILD.gn
  28. CHANGELOG
  29. codereview.settings
  30. DIR_METADATA
  31. heapprofd.rc
  32. LICENSE
  33. meson.build
  34. METADATA
  35. MODULE_LICENSE_APACHE2
  36. OWNERS
  37. perfetto.rc
  38. PerfettoIntegrationTests.xml
  39. PRESUBMIT.py
  40. README.chromium
  41. README.md
  42. TEST_MAPPING
  43. traced_perf.rc
  44. WORKSPACE
README.md

Perfetto - System profiling, app tracing and trace analysis

Perfetto is a production-grade open-source stack for performance instrumentation and trace analysis. It offers services and libraries and for recording system-level and app-level traces, native + java heap profiling, a library for analyzing traces using SQL and a web-based UI to visualize and explore multi-GB traces.

See https://perfetto.dev/docs or the /docs/ directory for documentation.