c4f3bfb5cb
We have MockPackages in DAS, although implementation is quite different. At some point we might want to unify them. But for now just name it similarly. R=brianwilkerson@google.com Change-Id: Id4bb2b16b845368d99260200f1172562362a8beb Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/158148 Reviewed-by: Brian Wilkerson <brianwilkerson@google.com> Commit-Queue: Konstantin Shcheglov <scheglov@google.com>