Fix for class members cannot have the same name as the class in dart2js

lib/compiler/implementation/warnings.dart

 // Copyright (c) 2011, 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.
 
 class MessageKind {
   final String template;
   const MessageKind(this.template);
 
   static final GENERIC = const MessageKind('#{1}');
 
@@ skipping 60 matching lines @@
   static final NOT_A_FIELD = const MessageKind(
       '#{1} is not a field');
   static final CONSTRUCTOR_CALL_EXPECTED = const MessageKind(
       "only call to 'this' or 'super' constructor allowed");
   static final INVALID_FOR_IN = const MessageKind(
       'invalid for-in variable declaration.');
   static final INVALID_INITIALIZER = const MessageKind(
       'invalid initializer');
   static final FUNCTION_WITH_INITIALIZER = const MessageKind(
       'only constructors can have initializers');
+  static final CONSTRUCTOR_WITH_RETURN_TYPE = const MessageKind(
+      'cannot have return type for constructor');

[ahe, 2012/08/24 08:32:18]

Please append new error messages just before COMPILER_CRASHED. Also, error
messages should be proper sentences.

+
   static final REDIRECTING_CONSTRUCTOR_CYCLE = const MessageKind(
       'cyclic constructor redirection');
   static final REDIRECTING_CONSTRUCTOR_HAS_BODY = const MessageKind(
       'redirecting constructor cannot have a body');
   static final REDIRECTING_CONSTRUCTOR_HAS_INITIALIZER = const MessageKind(
       'redirecting constructor cannot have other initializers');
   static final SUPER_INITIALIZER_IN_OBJECT = const MessageKind(
       "'Object' cannot have a super initializer");
   static final DUPLICATE_SUPER_INITIALIZER = const MessageKind(
       'cannot have more than one super initializer');
@@ skipping 212 matching lines @@
 
 class CompileTimeConstantError extends Diagnostic {
   CompileTimeConstantError(MessageKind kind, List<Type> arguments)
     : super(kind, arguments);
 }
 
 class CompilationError extends Diagnostic {
   CompilationError(MessageKind kind, List<Type> arguments)
     : super(kind, arguments);
 }