eb1ce5d640
These were found using the unnecessary-null-checks lint. It has a bug that prevents us from enabling it at the moment, but we should consider enabling it once the bug has been fixed. Change-Id: Ice250b5a6a8723c5f08dec5b07ae738e17c842cc Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/196550 Reviewed-by: Konstantin Shcheglov <scheglov@google.com> Commit-Queue: Brian Wilkerson <brianwilkerson@google.com>