tree df7d6f9dd964b15b5366232f3dd6ccc18dddce23
parent 2ad1b56534f2023ee036d6c54c3d27f5f6da34d9
author Konstantin Shcheglov <scheglov@google.com> 1740510420 -0800
committer Commit Queue <dart-scoped@luci-project-accounts.iam.gserviceaccount.com> 1740510420 -0800

Fine. Turn BaseName into extension type.

Change-Id: I2367be8648d790ca6bf64960a238d822268e7240
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/412120
Reviewed-by: Paul Berry <paulberry@google.com>
Commit-Queue: Konstantin Shcheglov <scheglov@google.com>