Dart: Refactors Proxies

examples/dart/wget/lib/main.dart

 #!mojo mojo:dart_content_handler
 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Run with, e.g.:
 // mojo_shell "mojo:dart_wget http://www.google.com"
 
 import 'dart:async';
 import 'dart:typed_data';
@@ skipping 29 matching lines @@
     MojoHandle.reportLeakedHandles();
   }
 
   Future<ByteData> _getUrl(String url) async {
     _initProxiesIfNeeded();
 
     var urlRequest = new UrlRequest()
       ..url = url
       ..autoFollowRedirects = true;
 
-    var urlResponse = await _urlLoader.ptr.start(urlRequest);
+    var urlResponse = await _urlLoader.start(urlRequest);
     print(">>> Headers <<<");
     print(urlResponse.response.headers.join('\n'));
 
     return DataPipeDrainer.drainHandle(urlResponse.response.body);
   }
 
   void _initProxiesIfNeeded() {
     if (_networkService == null) {
       _networkService = new NetworkServiceProxy.unbound();
       connectToService("mojo:network_service", _networkService);
     }
     if (_urlLoader == null) {
       _urlLoader = new UrlLoaderProxy.unbound();
-      _networkService.ptr.createUrlLoader(_urlLoader);
+      _networkService.createUrlLoader(_urlLoader);
     }
   }
 
   void _closeProxies() {
     _urlLoader.close();
     _urlLoader = null;
     _networkService.close();
     _networkService = null;
   }
 }
 
 main(List args, handleToken) {
   MojoHandle appHandle = new MojoHandle(handleToken);
   new WGet.fromHandle(appHandle);
 }