Check for cyclicity in named mixin applications.

tests/language/mixin_implements2_test.dart

Index: tests/language/mixin_implements2_test.dart
diff --git a/samples/tests/samples/standalone/time_test.dart b/tests/language/mixin_implements2_test.dart
similarity index 60%
copy from samples/tests/samples/standalone/time_test.dart
copy to tests/language/mixin_implements2_test.dart
index 32a8726ccaba707e59d14c9eb5589b446682c6d3..3fc284d6e4a2d518687782b125f8dcc371352956 100644
--- a/samples/tests/samples/standalone/time_test.dart
+++ b/tests/language/mixin_implements2_test.dart
@@ -2,13 +2,15 @@
 // 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.
 
-import '../../../time/time_server.dart' as time;
+// Regression test for named mixin applications with implements clause.
 
-// @static-clean
+class A {}
 
-/**
- * This test exists to ensure that the time sample compiles without errors.
- */
-void main() {
+class S {}
+class M {}
+
+typedef C = S with M implements A;
 
+void main() {
+  new C();
 }