Migrate language_2/implicit_downcast_during to NNBD.

Change-Id: Ie6631ecd6e597c09ef7e7a94709c3e4d9587e1a6
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/148286
Commit-Queue: Bob Nystrom <rnystrom@google.com>
Auto-Submit: Bob Nystrom <rnystrom@google.com>
Reviewed-by: Erik Ernst <eernst@google.com>

https://dart.googlesource.com/sdk/+/1ab2d95105d3c36ab3a6df232bbf077ff9df082a
1 file changed
tree: 29921f84af9094d694b47bdde70fc1dee0eca046
  1. commits.json