Paul Berry
7b578ca616
This is initially intended to support type promotion of fields (https://github.com/dart-lang/language/issues/2020). However, if time allows, we may roll other type inference improvements into it. Change-Id: Ie4548ceafe671a9a328a11ad950a4e70f4d3ca41 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/244766 Reviewed-by: Devon Carew <devoncarew@google.com> Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Paul Berry <paulberry@google.com>