Fix bug in r13232

runtime/bin/http_impl.dart

 // Copyright (c) 2012, 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 _HttpHeaders implements HttpHeaders {
   _HttpHeaders() : _headers = new Map<String, List<String>>();
 
   List<String> operator[](String name) {
     name = name.toLowerCase();
     return _headers[name];
@@ skipping 2083 matching lines @@
     // TODO(sgjesse): The path set here can contain both query and
     // fragment. They should be cracked and set correctly.
     return _open(method, new Uri.fromComponents(
         scheme: "http", domain: host, port: port, path: path));
   }
 
   HttpClientConnection _open(String method,
                              Uri uri,
                              [_HttpClientConnection connection]) {
     if (_shutdown) throw new HttpException("HttpClient shutdown");
-    if (method == null || uri.domain.isEmpty() == null) {
+    if (method == null || uri.domain.isEmpty()) {
       throw new ArgumentError(null);
     }
     return _prepareHttpClientConnection(method, uri, connection);
   }
 
   HttpClientConnection openUrl(String method, Uri url) {
     return _openUrl(method, url);
   }
 
   HttpClientConnection _openUrl(String method,
@@ skipping 232 matching lines @@
 
 
 class _RedirectInfo implements RedirectInfo {
   const _RedirectInfo(int this.statusCode,
                       String this.method,
                       Uri this.location);
   final int statusCode;
   final String method;
   final Uri location;
 }