Pay some naming debt.

pkg/front_end/lib/src/fasta/kernel/kernel_type_variable_builder.dart

 // Copyright (c) 2016, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library fasta.kernel_type_variable_builder;
 
 import 'package:kernel/ast.dart' show
     DartType,
     DynamicType,
     TypeParameter,
     TypeParameterType;
 
 import '../errors.dart' show
     inputError;
 
 import 'kernel_builder.dart' show
-    KernelInterfaceTypeBuilder,
+    KernelNamedTypeBuilder,
     KernelTypeBuilder,
     TypeVariableBuilder;
 
 class KernelTypeVariableBuilder
     extends TypeVariableBuilder<KernelTypeBuilder, DartType> {
   final TypeParameter parameter;
 
   KernelTypeVariableBuilder(String name, [KernelTypeBuilder bound])
       : parameter = new TypeParameter(name, const DynamicType()),
         super(name, bound);
@@ skipping 10 matching lines @@
   DartType buildTypesWithBuiltArguments(List<DartType> arguments) {
     if (arguments != null) {
       return inputError(null, null,
           "Can't use type arguments with type parameter $parameter");
     } else {
       return buildType(null);
     }
   }
 
   KernelTypeBuilder asTypeBuilder() {
-    return new KernelInterfaceTypeBuilder(name, null)
+    return new KernelNamedTypeBuilder(name, null)
         ..builder = this;
   }
 }