Fasta kernel builders.

pkg/fasta/lib/src/kernel/kernel_type_builder.dart

Index: pkg/fasta/lib/src/kernel/kernel_type_builder.dart
diff --git a/pkg/fasta/lib/src/kernel/kernel_type_builder.dart b/pkg/fasta/lib/src/kernel/kernel_type_builder.dart
new file mode 100644
index 0000000000000000000000000000000000000000..41816e71cc3e31ab7a0d9a29bd49f4d4a8cf2815
--- /dev/null
+++ b/pkg/fasta/lib/src/kernel/kernel_type_builder.dart
@@ -0,0 +1,18 @@
+// 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_builder;
+
+import 'package:kernel/ast.dart' show
+    DartType,
+    Supertype;
+
+import 'kernel_builder.dart' show
+    TypeBuilder;
+
+abstract class KernelTypeBuilder extends TypeBuilder {
+  DartType build();
+
+  Supertype buildSupertype();
+}