Import rasta tests.

pkg/fasta/test/rasta/issue_000080.dart

Index: pkg/fasta/test/rasta/issue_000080.dart
diff --git a/pkg/fasta/test/rasta/issue_000080.dart b/pkg/fasta/test/rasta/issue_000080.dart
new file mode 100644
index 0000000000000000000000000000000000000000..6a0292d34c7885ccaa3fa5863e2935248d206651
--- /dev/null
+++ b/pkg/fasta/test/rasta/issue_000080.dart
@@ -0,0 +1,19 @@
+// 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.md file.
+
+class Mixin {
+  var field;
+  foo() => 87;
+}
+
+class Foo extends Object with Mixin {
+  foo() => super.foo();
+  bar() => super.field;
+}
+
+main() {
+  var f = new Foo();
+  f.field = 42;
+  print(f.bar());
+}