This replaces the use of ShadowInvalidInitializer and ShadowInvalidFieldInitializer with InvalidInitializer.
This is part of creating a clearer separation between the body builder and inference, creating internal syntactical nodes in the body builder and transforming these into the lowered nodes during inference.
Change-Id: I5d227fecb375efc124ec5cf2769e7b764dcb4c1c
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/465880
Reviewed-by: Chloe Stefantsova <cstefantsova@google.com>
Reviewed-by: Erik Ernst <eernst@google.com>
Johnni Winther
65ce2c2473