Change List constructors.

sdk/lib/core/map.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.
 
 /**
  * A [Map] is an associative container, mapping a key to a value.
  * Null values are supported, but null keys are not.
  */
 abstract class Map<K, V> {
   /**
@@ skipping 148 matching lines @@
   // The sentinel when a key is deleted from the map.
   static const _DeletedKeySentinel _DELETED_KEY = const _DeletedKeySentinel();
 
   // The initial capacity of a hash map.
   static const int _INITIAL_CAPACITY = 8;  // must be power of 2
 
   _HashMapImpl() {
     _numberOfEntries = 0;
     _numberOfDeleted = 0;
     _loadLimit = _computeLoadLimit(_INITIAL_CAPACITY);
-    _keys = new List(_INITIAL_CAPACITY);
+    _keys = new List.fixedLength(_INITIAL_CAPACITY);
     _values = new List<V>(_INITIAL_CAPACITY);
   }
 
   factory _HashMapImpl.from(Map<K, V> other) {
     Map<K, V> result = new _HashMapImpl<K, V>();
     other.forEach((K key, V value) { result[key] = value; });
     return result;
   }
 
   static int _computeLoadLimit(int capacity) {
@@ skipping 86 matching lines @@
   static bool _isPowerOfTwo(int x) {
     return ((x & (x - 1)) == 0);
   }
 
   void _grow(int newCapacity) {
     assert(_isPowerOfTwo(newCapacity));
     int capacity = _keys.length;
     _loadLimit = _computeLoadLimit(newCapacity);
     List oldKeys = _keys;
     List<V> oldValues = _values;
-    _keys = new List(newCapacity);
+    _keys = new List.fixedLength(newCapacity);
     _values = new List<V>(newCapacity);
     for (int i = 0; i < capacity; i++) {
       // [key] can be either of type [K] or [_DeletedKeySentinel].
       Object key = oldKeys[i];
       // If there is no key, we don't need to deal with the current slot.
       if (key == null || identical(key, _DELETED_KEY)) {
         continue;
       }
       V value = oldValues[i];
       // Insert the {key, value} pair in their new slot.
@@ skipping 231 matching lines @@
 
   void clear() {
     _map.clear();
     _list.clear();
   }
 
   String toString() {
     return Maps.mapToString(this);
   }
 }