Track live instance and allocation counts for classes

runtime/vm/service/message.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.
 
 part of vmservice;
 
 class Message {
   final Completer _completer = new Completer.sync();
   bool get completed => _completer.isCompleted;
   /// Future of response.
   Future<String> get response => _completer.future;
   /// Path.
-  final List<String> path = new List<String>();
+  final List path = new List();
   /// Options.
-  final Map<String, String> options = new Map<String, String>();
+  final Map options = new Map();
 
   void _setPath(List<String> pathSegments) {
     if (pathSegments == null) {
       return;
     }
     pathSegments.forEach((String segment) {
       if (segment == null || segment == '') {
         return;
       }
       path.add(segment);
@@ skipping 70 matching lines @@
         'options': options
     }));
   }
 }
 
 void sendIsolateServiceMessage(SendPort sp, List m)
     native "VMService_SendIsolateServiceMessage";
 
 void sendRootServiceMessage(List m)
     native "VMService_SendRootServiceMessage";