Patches to support Dart VM patch files in dart2js.

runtime/lib/convert_patch.dart

 // Copyright (c) 2014, 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.
 
 import "dart:_internal" show POWERS_OF_TEN;
 
 // JSON conversion.
 
-patch _parseJson(String json, reviver(var key, var value)) {
+patch _parseJson(String source, reviver(key, value)) {
   _BuildJsonListener listener;
   if (reviver == null) {
     listener = new _BuildJsonListener();
   } else {
     listener = new _ReviverJsonListener(reviver);
   }
   var parser = new _JsonStringParser(listener);
-  parser.chunk = json;
-  parser.chunkEnd = json.length;
+  parser.chunk = source;
+  parser.chunkEnd = source.length;
   parser.parse(0);
   parser.close();
   return listener.result;
 }
 
 patch class Utf8Decoder {
   /* patch */
   Converter<List<int>, dynamic> fuse(Converter<String, dynamic> next) {
     if (next is JsonDecoder) {
       return new _JsonUtf8Decoder(next._reviver, this._allowMalformed);
@@ skipping 1737 matching lines @@
     _parser.parse(start);
   }
 
   void close() {
     _parser.close();
     var decoded = _parser.result;
     _sink.add(decoded);
     _sink.close();
   }
 }