309140693c
This is one step in refactoring non-nullable enablement * update AstBuilder to record isNonNullable in CompilationUnitImpl * update ErrorVerifier to pull non-nullable from CompilationUnitImpl Change-Id: I78e5f529330f10f294ad1c1b3b7ac8b672a5ee9b Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/95426 Commit-Queue: Dan Rubel <danrubel@google.com> Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Reviewed-by: Konstantin Shcheglov <scheglov@google.com>