[RPP] Refactor the `draw` function into multiple functions for simplicity

The `draw` function in the FlameChart class draws the perf panel flame
chart into the canvas. Due to the complexity of the data being drawn and
little use of helper functions, the function was too long and hard to
understand.

This CL splits the function into multiple helper functions, aiming to
improve readability. Each function is also documented with a short
description.

Bug: 1386091
Change-Id: I24b5325b4d1ed133d4ae81bd5c4c54149e59fc8b
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/4231014
Commit-Queue: Andres Olivares <andoli@chromium.org>
Reviewed-by: Nancy Li <nancyly@chromium.org>
1 file changed
tree: a417c7cc21412d1e80eca6fa7c313f84d61ff7c6
  1. .vscode/
  2. build_overrides/
  3. config/
  4. docs/
  5. extension-api/
  6. front_end/
  7. inspector_overlay/
  8. node_modules/
  9. scripts/
  10. test/
  11. third_party/
  12. v8/
  13. .clang-format
  14. .editorconfig
  15. .eslintignore
  16. .eslintrc.js
  17. .gitattributes
  18. .gitignore
  19. .gn
  20. .mailmap
  21. .npmignore
  22. .npmrc
  23. .style.yapf
  24. .stylelintignore
  25. .stylelintrc.json
  26. AUTHORS
  27. BUILD.gn
  28. codereview.settings
  29. DEPS
  30. LICENSE
  31. OWNERS
  32. package-lock.json
  33. package.json
  34. PRESUBMIT.py
  35. README.md
  36. tsconfig.json
  37. WATCHLISTS
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