Use type variables on Typedef correctly.

pkg/front_end/lib/src/fasta/dill/dill_typedef_builder.dart

Index: pkg/front_end/lib/src/fasta/dill/dill_typedef_builder.dart
diff --git a/pkg/front_end/lib/src/fasta/dill/dill_typedef_builder.dart b/pkg/front_end/lib/src/fasta/dill/dill_typedef_builder.dart
index 5c424d8fb93d14ed9725723beca95910b30cf0e3..2d7b21bd7b95936a2596729c3ef6f4c00dc5ed80 100644
--- a/pkg/front_end/lib/src/fasta/dill/dill_typedef_builder.dart
+++ b/pkg/front_end/lib/src/fasta/dill/dill_typedef_builder.dart
@@ -4,40 +4,36 @@
 
 library fasta.dill_typedef_builder;
 
-import 'package:front_end/src/fasta/builder/library_builder.dart';
-import 'package:front_end/src/fasta/errors.dart';
 import 'package:kernel/ast.dart' show DartType, Typedef;
 
+import 'package:front_end/src/fasta/errors.dart' show internalError;
+
 import '../kernel/kernel_builder.dart'
     show
-        FormalParameterBuilder,
         KernelFunctionTypeAliasBuilder,
-        KernelTypeBuilder,
+        KernelFunctionTypeBuilder,
+        LibraryBuilder,
         MetadataBuilder,
         TypeVariableBuilder;
+
 import 'dill_library_builder.dart' show DillLibraryBuilder;
 
 class DillFunctionTypeAliasBuilder extends KernelFunctionTypeAliasBuilder {
   DillFunctionTypeAliasBuilder(Typedef typedef, DillLibraryBuilder parent)
-      : super(null, null, typedef.name, null, null, parent, typedef.fileOffset,
+      : super(null, typedef.name, null, null, parent, typedef.fileOffset,
             typedef);
 
-  @override
-  List<FormalParameterBuilder> get formals {
-    return internalError('Not implemented.');
-  }
-
   List<MetadataBuilder> get metadata {
     return internalError('Not implemented.');
   }
 
   @override
-  KernelTypeBuilder get returnType {
+  List<TypeVariableBuilder> get typeVariables {
     return internalError('Not implemented.');
   }
 
   @override
-  List<TypeVariableBuilder> get typeVariables {
+  KernelFunctionTypeBuilder get type {
     return internalError('Not implemented.');
   }