Fix analyzer's treatment of mixin constructors.

tests/language/mixin_forwarding_constructor3_test.dart

Index: tests/language/mixin_forwarding_constructor3_test.dart
diff --git a/tests/language/mixin_forwarding_constructor1_test.dart b/tests/language/mixin_forwarding_constructor3_test.dart
similarity index 65%
copy from tests/language/mixin_forwarding_constructor1_test.dart
copy to tests/language/mixin_forwarding_constructor3_test.dart
index b0e97ab7af286a6f84dc9aaa9947090d125b3f96..1d2f5dc694ef3f97c698fb4b4152b8ab93f3eb21 100644
--- a/tests/language/mixin_forwarding_constructor1_test.dart
+++ b/tests/language/mixin_forwarding_constructor3_test.dart
@@ -1,7 +1,10 @@
-// Copyright (c) 2013, the Dart project authors.  Please see the AUTHORS file
+// Copyright (c) 2014, 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 file.
 
+// Verify that a named mixin constructor forwards to the corresponding named
+// base class constructor.
+
 import "package:expect/expect.dart";
 
 abstract class Mixin1 {
@@ -14,12 +17,14 @@ abstract class Mixin2 {
 
 class A {
   var superField;
-  A(foo) : superField = foo;
+  A(foo) : superField = 0;
+  A.c1(foo) : superField = foo;
+  A.c2(foo) : superField = 0;
 }
 
 class B extends A with Mixin1, Mixin2 {
   var field = 4;
-  B(unused) : super(3);
+  B(unused) : super.c1(3);
 }
 
 main() {