Fix build

runtime/bin/string_stream.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.
 
 // Utility class which can deliver bytes one by one from a number of
 // buffers added.
 class _BufferList {
   _BufferList() : _index = 0, _length = 0, _buffers = new Queue();
 
   void add(List<int> buffer) {
@@ skipping 234 matching lines @@
     }
   }
 
   void _closeHandler() {
     _inputClosed = true;
     if (_buffer !== null || !_decoder.isEmpty()) {
       // If there is still data buffered in either the buffer or the
       // decoder call the data handler.
       if (_clientDataHandler !== null) _clientDataHandler();
     } else {
-      closed_ = true;
+      _closed = true;
       if (_clientCloseHandler !== null) _clientCloseHandler();
     }
   }
 
   void _readData() {
     List<int> data = _input.read();
     if (data !== null) {
       _decoder.write(data);
     }
   }
@@ skipping 79 matching lines @@
   String _encoding;
   _Decoder _decoder;
   String _buffer;  // String can be buffered here if readLine is used.
   int _bufferLineStart;  // Current offset into _buffer if any.
   bool _inputClosed = false;  // Is the underlying input stream closed?
   bool _closed = false;  // Is this stream closed.
   bool _eof = false;  // Has all data been read from the decoder?
   var _clientDataHandler;
   var _clientCloseHandler;
 }