Implementation of modified scoping for initializing formals.

tests/compiler/dart2js/message_kind_helper.dart

 // Copyright (c) 2013, 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.
 
 library dart2js.test.message_kind_helper;
 
 import 'package:expect/expect.dart';
 import 'dart:async';
 
 import 'package:compiler/src/commandline_options.dart';
@@ skipping 17 matching lines @@
 /// so try to change error reporting logic before adding an exception.
 final Set<MessageKind> kindsWithExtraMessages = new Set<MessageKind>.from([
     // If you add something here, please file a *new* bug report.
     // See http://dartbug.com/18361:
     MessageKind.CANNOT_EXTEND_MALFORMED,
     MessageKind.CANNOT_IMPLEMENT_MALFORMED,
     MessageKind.CANNOT_MIXIN,
     MessageKind.CANNOT_MIXIN_MALFORMED,
     MessageKind.CANNOT_INSTANTIATE_ENUM,
     MessageKind.CYCLIC_TYPEDEF_ONE,
+    MessageKind.DUPLICATE_DEFINITION,
     MessageKind.EQUAL_MAP_ENTRY_KEY,
     MessageKind.FINAL_FUNCTION_TYPE_PARAMETER,
     MessageKind.FORMAL_DECLARED_CONST,
     MessageKind.FORMAL_DECLARED_STATIC,
     MessageKind.FUNCTION_TYPE_FORMAL_WITH_DEFAULT,
     MessageKind.HIDDEN_IMPLICIT_IMPORT,
     MessageKind.HIDDEN_IMPORT,
     MessageKind.INHERIT_GETTER_AND_METHOD,
     MessageKind.UNIMPLEMENTED_METHOD,
     MessageKind.UNIMPLEMENTED_METHOD_ONE,
@@ skipping 105 matching lines @@
                     kindsWithPendingClasses.contains(template));
 
       if (!pendingStuff) {
         // If there is pending stuff, or the compiler was cancelled, we
         // shouldn't reuse the compiler.
         cachedCompiler = compiler;
       }
     });
   }).then((_) => cachedCompiler);
 }