Sort declarations in migration_cli.dart
Sort declarations in migration_cli.dart

Change-Id: I14c4b9b77eec3fef5a23f76877a8d291ca217198
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/167423
Reviewed-by: Samuel Rawlins <5cf2cac5eec2ad6d0eb2b0f4ff6af9a590ce2bf6@google.com>

dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk,dart-lang/sdk