Implementation Issue for Super Mixins: Dart2JS

[JekCharlsonYu]

What: Issue for implementation for Dart2JS

ETA: 10/15 in Dart Repo.

For: SuperMixins Implementation and strawman documentation

Meta Issue: This is subsumed under the Super Mixins Meta Issue in the Language Repo

Comments: Feel free to break this further into further tasks and issues, or use as a meta issue for all the tasks in the implementation plan

[sigmundch]

Implementation landed. There appears to be a few tests still failing, most due to CFE issues, but a couple that might require changes in the dart2js implementation.

Johnni, could you take a look at those 2 tests (see https://dart-review.googlesource.com/c/sdk/+/77012)?

[vsmenon]

Any updates here?

[sigmundch]

the last 2 tests were fixed on friday, only remaining work is static errors from the CFE. I believe we can mark this as closed.