Fix a couple of Dart style naming violations in Intl

pkg/intl/bin/generate_from_arb.dart

 #!/usr/bin/env 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.
 
 /**
  * A main program that takes as input a source Dart file and a number
  * of ARB files representing translations of messages from the corresponding
  * Dart file. See extract_to_arb.dart and make_hardcoded_translation.dart.
  *
@@ skipping 119 matching lines @@
       super(name, translated);
 
   List<MainMessage> get originalMessages => (super.originalMessages == null) ?
       _findOriginals() : super.originalMessages;
 
   // We know that our [id] is the name of the message, which is used as the
   //key in [messages].
   List<MainMessage> _findOriginals() => originalMessages = messages[id];
 }
 
-final pluralAndGenderParser = new ICUParser().message;
-final plainParser = new ICUParser().nonIcuMessage;
+final pluralAndGenderParser = new IcuParser().message;
+final plainParser = new IcuParser().nonIcuMessage;