Nicholas Shahan
84aa0207cf
Update source code in tests to be migrated to null safety. Tests are still running in unsound null safety. In most cases types are now inferred to be non-nullable so the code that makes expressions to be seen as nullable now require `as dynamic` to allow them to compile. Update nullable inference logic to recognize `.toString()` on a String as non-nullable in code that has been migrated to null safety. Change-Id: Id0771cc5317e3dafbf10e766b80d2994752bacc8 Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/337700 Commit-Queue: Nicholas Shahan <nshahan@google.com> Reviewed-by: Mark Zhou <markzipan@google.com>