Import rasta tests.

pkg/fasta/test/rasta/issue_000007.dart

Index: pkg/fasta/test/rasta/issue_000007.dart
diff --git a/pkg/fasta/test/rasta/issue_000007.dart b/pkg/fasta/test/rasta/issue_000007.dart
new file mode 100644
index 0000000000000000000000000000000000000000..7553185d610fd9837b32c34d67309dfc96519162
--- /dev/null
+++ b/pkg/fasta/test/rasta/issue_000007.dart
@@ -0,0 +1,13 @@
+// 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 Base {}
+class Mixin {
+  foo() => print('foo');
+}
+class Sub extends Base with Mixin {}
+
+main() {
+  new Sub().foo();
+}