Fix type-errors.

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)) {
   _BuildJsonListener listener;
@@ skipping 1353 matching lines @@
     addSlice(chunk, 0, chunk.length, false);
   }
 
   void close() {
     _parser.close();
     var decoded = _parser.result;
     _sink.add(decoded);
     _sink.close();
   }
 
-  Utf8ConversionSink asUtf8Sink(bool allowMalformed) {
+  ByteConversionSink asUtf8Sink(bool allowMalformed) {
     _parser = null;
     return new _JsonUtf8DecoderSink(_reviver, _sink, allowMalformed);
   }
 }
 
 class _Utf8StringBuffer {
   static const int INITIAL_CAPACITY = 32;
   // Partial state encoding.
   static const int MASK_TWO_BIT = 0x03;
   static const int MASK_SIZE = MASK_TWO_BIT;
@@ skipping 287 matching lines @@
 }
 
 double _parseDouble(String source, int start, int end)
     native "Double_parse";
 
 /**
  * Implements the chunked conversion from a UTF-8 encoding of JSON
  * to its corresponding object.
  */
 class _JsonUtf8DecoderSink extends ByteConversionSinkBase {
-  _ChunkedUtf8Parser _parser;
+  _JsonUtf8Parser _parser;
   final Sink<Object> _sink;
 
   _JsonUtf8DecoderSink(reviver, this._sink, bool allowMalformed)
       : _parser = _createParser(reviver, allowMalformed);
 
   static _ChunkedJsonParser _createParser(reviver, bool allowMalformed) {
     _BuildJsonListener listener;
     if (reviver == null) {
       listener = new _BuildJsonListener();
     } else {
@@ skipping 17 matching lines @@
     _parser.parse(start);
   }
 
   void close() {
     _parser.close();
     var decoded = _parser.result;
     _sink.add(decoded);
     _sink.close();
   }
 }