Import rasta tests.

pkg/fasta/test/rasta/parser_error.dart

Index: pkg/fasta/test/rasta/parser_error.dart
diff --git a/pkg/fasta/test/rasta/parser_error.dart b/pkg/fasta/test/rasta/parser_error.dart
new file mode 100644
index 0000000000000000000000000000000000000000..130d0ea251521f491ce56ec68d43880edb9a34e4
--- /dev/null
+++ b/pkg/fasta/test/rasta/parser_error.dart
@@ -0,0 +1,16 @@
+// 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.
+
+// Copy of third_party/dart-sdk/tests/language/argument_definition_test.dart.
+
+import "package:expect/expect.dart";
+
+int test(a, {b, c}) {
+  if (?b) return b;  /// 01: compile-time error
+  return a + b + c;
+}
+
+main() {
+  Expect.equals(6, test(1, b: 2, c:3));
+}