[RPP cpuprofile] Clean up the unnecessary code for cpuprofile

Originally I was looking the bug of removing JSRoot, then I find out all the three 'fake' trace event we injected, only partial of each are used, and no overlap, so I just tried to merge all to the 'real' synthetic cpuprofile one.

During the merging, i just update some string to enum member and also update the type check when export file by the way.

Bug: 341234884
Change-Id: If2ce79fc0312e427d392cf39b52bfc1ff5e2bbdb
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/6652271
Reviewed-by: Paul Irish <paulirish@chromium.org>
Commit-Queue: Nancy Li <nancyly@chromium.org>
8 files changed
tree: c878bcbdb7e0c1ce71c8e602894b73f1a63a5c97
  1. .vscode/
  2. build_overrides/
  3. config/
  4. docs/
  5. extension-api/
  6. extensions/
  7. front_end/
  8. inspector_overlay/
  9. node_modules/
  10. scripts/
  11. test/
  12. third_party/
  13. v8/
  14. .clang-format
  15. .clang-format-ignore
  16. .editorconfig
  17. .git-blame-ignore-revs
  18. .gitallowed
  19. .gitattributes
  20. .gitignore
  21. .gitmodules
  22. .gn
  23. .mailmap
  24. .npmignore
  25. .npmrc
  26. .style.yapf
  27. .stylelintignore
  28. .stylelintrc.json
  29. AUTHORS
  30. BUILD.gn
  31. codereview.settings
  32. CONTRIBUTING.md
  33. DEPS
  34. DIR_METADATA
  35. eslint.config.mjs
  36. favicon.ico
  37. LICENSE
  38. OWNERS
  39. package-lock.json
  40. package.json
  41. PRESUBMIT.py
  42. README.md
  43. WATCHLISTS
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