Generalize DeclarationBuilder.resolveTypes.

pkg/front_end/lib/src/fasta/builder/type_declaration_builder.dart

Index: pkg/front_end/lib/src/fasta/builder/type_declaration_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/builder/type_declaration_builder.dart b/pkg/front_end/lib/src/fasta/builder/type_declaration_builder.dart
index 30c601514c18b8f43dc8c9977e6a21977614c37e..bb3ceb2c87cc15ffa1adcdb05481000a043f5159 100644
--- a/pkg/front_end/lib/src/fasta/builder/type_declaration_builder.dart
+++ b/pkg/front_end/lib/src/fasta/builder/type_declaration_builder.dart
@@ -18,11 +18,9 @@ abstract class TypeDeclarationBuilder<T extends TypeBuilder, R>
 
   final String name;
 
-  final List<T> types;
-
   Builder parent;
 
-  TypeDeclarationBuilder(this.metadata, this.modifiers, this.name, this.types,
+  TypeDeclarationBuilder(this.metadata, this.modifiers, this.name,
       Builder parent, int charOffset, [Uri fileUri])
       : parent = parent, super(parent, charOffset, fileUri ?? parent?.fileUri);