Change List constructors.

samples/chat/chat_server_lib.dart

 // Copyright (c) 2012, 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.
 
 library chat_server;
 import 'dart:async';
 import 'dart:io';
 import 'dart:isolate';
 import 'dart:json' as json;
 import 'dart:math';
@@ skipping 621 matching lines @@
 // range is split over a number of buckets where each bucket collects
 // the number of events happening in that time sub-range. The first
 // constructor arument specifies the time range in milliseconds. The
 // buckets are in the list _buckets organized at a circular buffer
 // with _currentBucket marking the bucket where an event was last
 // recorded. A current sum of the content of all buckets except the
 // one pointed a by _currentBucket is kept in _sum.
 class Rate {
   Rate([int timeRange = 1000, int buckets = 10])
       : _timeRange = timeRange,
-        _buckets = new List(buckets + 1),  // Current bucket is not in the sum.
+        _buckets = new List.fixedLength(buckets + 1),  // Current bucket is not in the sum.
         _currentBucket = 0,
         _currentBucketTime = new Date.now().millisecondsSinceEpoch,
         _sum = 0 {
     _bucketTimeRange = (_timeRange / buckets).toInt();
     for (int i = 0; i < _buckets.length; i++) {
       _buckets[i] = 0;
     }
   }
 
   // Record the specified number of events.
@@ skipping 32 matching lines @@
     }
   }
 
   int _timeRange;
   List<int> _buckets;
   int _currentBucket;
   int _currentBucketTime;
   num _bucketTimeRange;
   int _sum;
 }