Serialize exports scopes.

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

Index: pkg/front_end/lib/src/fasta/builder/invalid_type_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/builder/invalid_type_builder.dart b/pkg/front_end/lib/src/fasta/builder/invalid_type_builder.dart
index 945f7e140bb640e99232a7180383ac1318b91404..0346e020986b034d7ae5e23f7a501b2d5cb20456 100644
--- a/pkg/front_end/lib/src/fasta/builder/invalid_type_builder.dart
+++ b/pkg/front_end/lib/src/fasta/builder/invalid_type_builder.dart
@@ -4,6 +4,8 @@
 
 library fasta.invalid_type_builder;
 
+import '../fasta_codes.dart' show Message;
+
 import 'builder.dart' show TypeBuilder, TypeDeclarationBuilder;
 
 abstract class InvalidTypeBuilder<T extends TypeBuilder, R>
@@ -11,5 +13,7 @@ abstract class InvalidTypeBuilder<T extends TypeBuilder, R>
   InvalidTypeBuilder(String name, int charOffset, [Uri fileUri])
       : super(null, 0, name, null, charOffset, fileUri);
 
+  Message get message;
+
   String get debugName => "InvalidTypeBuilder";
 }