Another round of minor fixes in the IO libraries.

runtime/bin/chunked_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.
 
 class _ChunkedInputStream implements ChunkedInputStream {
   _ChunkedInputStream(InputStream this._input, [int chunkSize])
       : _chunkSize = chunkSize, _bufferList = new _BufferList() {
     if (_chunkSize === null) {
       _chunkSize = 0;
     }
@@ skipping 30 matching lines @@
 
   void set dataHandler(void callback()) {
     _clientDataHandler = callback;
     _checkInstallDataHandler();
   }
 
   void set closeHandler(void callback()) {
     _clientCloseHandler = callback;
   }
 
+  void set errorHandler(void callback()) {
+    _input.errorHandler = callback;
+  }
+
   void _dataHandler() {
     _readData();
     if (_bufferList.length >= _chunkSize && _clientDataHandler !== null) {
       _clientDataHandler();
     }
     _checkScheduleCallback();
     _checkInstallDataHandler();
   }
 
   void _readData() {
@@ skipping 64 matching lines @@
   InputStream _input;
   _BufferList _bufferList;
   int _chunkSize;
   bool _inputClosed = false;  // Is the underlying input stream closed?
   bool _closed = false;  // Has the close handler been called?.
   Timer _scheduledDataCallback;
   Timer _scheduledCloseCallback;
   Function _clientDataHandler;
   Function _clientCloseHandler;
 }