[RenderBlocking] Only consider body requests that are high priority

The render blocking audit in Lighthouse actually has a second level of
filtering that only includes requests that are in the FCP simulation
graph. The FCP simulation graph filters out low priority requests:
http://shortn/_rUloOEiNu9

For requests marked `in_body_parser_blocking` we should ensure that
the priority is high enough to be considered render blocking. There are
exceptions to the logic added but this is the definition Lighthouse has
been using so this is at least a good place to start.

This CL changes nothing about the behavior of requests marked `blocking`

Bug: 328489888
Change-Id: I7700118e78f9f36f62ba5acfb2da68928ccc1879
Reviewed-on: https://chromium-review.googlesource.com/c/devtools/devtools-frontend/+/5537846
Reviewed-by: Paul Irish <paulirish@chromium.org>
Commit-Queue: Adam Raine <asraine@chromium.org>
6 files changed
tree: b781e084ed88ee5d066e758afb6f02175b97afe0
  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. .editorconfig
  16. .eslintignore
  17. .eslintrc.js
  18. .git-blame-ignore-revs
  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. DEPS
  33. LICENSE
  34. OWNERS
  35. package-lock.json
  36. package.json
  37. PRESUBMIT.py
  38. README.md
  39. tsconfig.json
  40. WATCHLISTS
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