Import rasta tests.

pkg/fasta/test/rasta/class_hierarchy.dart

Index: pkg/fasta/test/rasta/class_hierarchy.dart
diff --git a/pkg/fasta/test/rasta/class_hierarchy.dart b/pkg/fasta/test/rasta/class_hierarchy.dart
new file mode 100644
index 0000000000000000000000000000000000000000..81a22f0220a547b1d43f712bb8704d0a13d84660
--- /dev/null
+++ b/pkg/fasta/test/rasta/class_hierarchy.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.
+
+class A extends Missing {}
+class B implements Missing {}
+class C = Object with Missing;
+
+class D {
+  factory D() = Missing;
+}
+
+void main() {
+  new A();
+  new B();
+  new C();
+  new D();
+}