tree a303b0aef7212f364b416cece734ed0814071ec6
parent a578c646c3386b5d6aff0bd4b8b99e8d74e1050a
author Nicholas Shahan <nshahan@google.com> 1582334421 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1582334421 +0000

[dartdevc] Fix nullability of function types and typedefs

These fixes also prepare for an upcoming change to normalize FutureOr
types.

- Cache and emit the hoisted function type at the top level without
  nullability wrappers.
- Always emit nullability wrappers at the use site.
- Fix issue where sometimes the return type would be double wrapped.

Change-Id: If4a0c94e62eca626f271cc3c259c813911075d9a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/136404
Reviewed-by: Mark Zhou <markzipan@google.com>
Reviewed-by: Sigmund Cherem <sigmund@google.com>
Commit-Queue: Nicholas Shahan <nshahan@google.com>