Add XSLTProcessor constructor

client/dom/src/native_FactoryProviders.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 _AudioContextFactoryProvider {
   factory AudioContext() => FactoryProviderImplementation.createAudioContext();
 }
 
 class _DOMParserFactoryProvider {
   factory DOMParser() => FactoryProviderImplementation.createDOMParser();
@@ skipping 45 matching lines @@
   factory WebKitPoint(num x, num y) => FactoryProviderImplementation.createWebKitPoint(x, y);
 }
 
 class _WebSocketFactoryProvider {
   factory WebSocket(String url) => FactoryProviderImplementation.createWebSocket(url);
 }
 
 class _XMLHttpRequestFactoryProvider {
   factory XMLHttpRequest() => FactoryProviderImplementation.createXMLHttpRequest();
 }
+
+class _XSLTProcessorFactoryProvider {
+  factory XSLTProcessor() => FactoryProviderImplementation.createXSLTProcessor();
+}