[dart2js] Handle injected names from late fields
[dart2js] Handle injected names from late fields

Change-Id: I5ca6535a282ce8fdf4fba6cd1fa5752bce2921c9
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/136714
Reviewed-by: Sigmund Cherem <beaea8fd7d2a56555046ba4f362c8a93e3938576@google.com>
Commit-Queue: Stephen Adams <60cb5b73b7e0cb7dcda53302da4fab6ecfc7fa8b@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk