Do not emit substitutions for unnamed mixin applications.

tests/language/mixin_type_parameter4_test.dart

Index: tests/language/mixin_type_parameter4_test.dart
diff --git a/tests/compiler/dart2js_extra/generics_factories_test.dart b/tests/language/mixin_type_parameter4_test.dart
similarity index 50%
copy from tests/compiler/dart2js_extra/generics_factories_test.dart
copy to tests/language/mixin_type_parameter4_test.dart
index 5ca2d5972ff0dacf51160c592504deac529e74f6..00fe43e3e55fa8fba613473dea8a6a1fd966af26 100644
--- a/tests/compiler/dart2js_extra/generics_factories_test.dart
+++ b/tests/language/mixin_type_parameter4_test.dart
@@ -2,23 +2,22 @@
 // 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.
 
-// Test that factories are marked as needing rti.
-
 import "package:expect/expect.dart";
 
-class A<T> {
-  foo(o) => o is T;
-  factory A.c() => new B<T>();
-  A();
-}
+class R<E, F> {}
+
+class M<J> implements R<bool, J> {}
 
-class B<T> extends A<T> {}
+class B1 {}
+class B2 {}
 
-class C {}
+class A1<T> extends B1 with M<T> {}
 
-class D {}
+typedef A2<T> = B2 with M<T>;
 
 main() {
-  Expect.isTrue(new A<C>.c().foo(new C()));
-  Expect.isFalse(new A<C>.c().foo(new D()));
+  var ab = new A1<int>();
+  Expect.isTrue(ab is R<bool, int>);
+  ab = new A2<int>();
+  Expect.isTrue(ab is R<bool, int>);
 }