tree b59daa1aab02b7d3d560f06364c48d1a6ab7c423
parent dde0c68dfb2ea136c62ec350468061875b2bc396
author Paul Berry <paulberry@google.com> 1561573126 +0000
committer commit-bot@chromium.org <commit-bot@chromium.org> 1561573126 +0000

Migration: Enable support for factory constructors.

It turns out that we don't need any special support for factory
constructors; the migration engine already knows that their return
type should be non-nullable, and it propagates that non-nullability
properly backward from return statements.  So we just need to remove
the error handling logic that prevented factory constructors from
being used.

Change-Id: I7875750fd603ecb2fb65f3831a7883a2d4c9a11a
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/107380
Commit-Queue: Paul Berry <paulberry@google.com>
Reviewed-by: Konstantin Shcheglov <scheglov@google.com>