Import rasta tests.

pkg/fasta/test/rasta/issue_000048.dart

Index: pkg/fasta/test/rasta/issue_000048.dart
diff --git a/pkg/fasta/test/rasta/issue_000048.dart b/pkg/fasta/test/rasta/issue_000048.dart
new file mode 100644
index 0000000000000000000000000000000000000000..02114800170b4bf35a004e33cccc0856c4762dc0
--- /dev/null
+++ b/pkg/fasta/test/rasta/issue_000048.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 A {
+  bool v1;
+  num v2;
+  A(bool this.v1, num this.v2);
+}
+
+class M1 {
+  num v2 = 0;
+}
+
+class C = A with M1;
+
+main() {
+  C c = new C(true, 2);
+}