[dartdevc] fix mixin super constructor calls in kernel backend

Kernel and Analyzer have slightly different rules for creating implicit
constructors, which DDC's kernel backend did not account for. This
resulted in a mismatch between which super constructor calls it thought
were necessary, vs which constructors were generated.

Both DDC backends are now less sensitive to the representations, and
the kernel backend checks for field initializers in mixin declarations,
rather than relying on the (nonexistent) implicit constructor node.

Change-Id: I01a6ae11ecf78193d7db227ba0b7adeb27d514d5
Reviewed-on: https://dart-review.googlesource.com/c/88432
Reviewed-by: Vijay Menon <vsm@google.com>
Commit-Queue: Jenny Messerly <jmesserly@google.com>
3 files changed
tree: fdcb9e164456d3363c6a14da3a31186ccacaad6e
  1. .clang-format
  2. .gitattributes
  3. .gitconfig
  4. .github/
  5. .gitignore
  6. .gn
  7. .mailmap
  8. .packages
  9. .vpython
  10. AUTHORS
  11. BUILD.gn
  12. CHANGELOG.md
  13. CONTRIBUTING.md
  14. DEPS
  15. LICENSE
  16. PATENTS
  17. PRESUBMIT.py
  18. README.dart-sdk
  19. README.md
  20. WATCHLISTS
  21. build/
  22. client/
  23. codereview.settings
  24. dartdoc_options.yaml
  25. docs/
  26. pkg/
  27. runtime/
  28. samples-dev/
  29. samples/
  30. sdk/
  31. tests/
  32. third_party/
  33. tools/
  34. utils/
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