Change new List(n) to return fixed length list.

sdk/lib/utf/utf_stream.dart

 // Copyright (c) 2013, 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.
 
 part of dart.utf;
 
 class _HelperStreamController<T> extends StreamController<T> {
   final Function onPauseChanged;
 
   _HelperStreamController(this.onPauseChanged);
@@ skipping 25 matching lines @@
     }
   }
 
   Stream<String> bind(Stream<List<int>> stream) {
     _subscription = stream.listen(
         _onData,
         onError: _controller.signalError,
         onDone: () {
           if (_carry != null) {
             _controller.add(new String.fromCharCodes(
-                new List.fixedLength(_carry.length, fill: _replacementChar)));
+                new List.filled(_carry.length, _replacementChar)));
           }
           _controller.close();
         },
         unsubscribeOnError: false);
     if (_paused) _subscription.pause();
     return _controller.stream;
   }
 
   void _onData(List<int> bytes) {
     _buffer = <int>[];
@@ skipping 158 matching lines @@
       }
       for (int i = additionalBytes; i > 0; i--) {
         // 10xxxxxx (xxxxxx is next 6 bits from the top).
         bytes.add(((charCode >> (6 * (i - 1))) & 0x3F) | 0x80);
       }
       pos += additionalBytes + 1;
     }
     return bytes;
   }
 }