Issue 43152. Use existing LineInfo in newDiagnosticMessage().
Issue 43152. Use existing LineInfo in newDiagnosticMessage().

R=1f7641b6b14c52b9163524ab8d9aabff80176f21@google.com

Bug: https://github.com/dart-lang/sdk/issues/43152
Change-Id: I1e88df0a5d2b1695b45ddfe22c84a354a9e33c4e
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/159741
Reviewed-by: Brian Wilkerson <1f7641b6b14c52b9163524ab8d9aabff80176f21@google.com>
Commit-Queue: Konstantin Shcheglov <09e4d7516628963212bf4aace2f97603d2b706e4@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