Make List.from and Iterable.toList default to not growable.

runtime/lib/array.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.
 
 
 // TODO(srdjan): Use shared array implementation.
 class _ObjectArray<E> implements List<E> {
 
   factory _ObjectArray(length) native "ObjectArray_allocate";
 
@@ skipping 210 matching lines @@
   E get single {
     if (length == 1) return this[0];
     if (length == 0) throw new StateError("No elements");
     throw new StateError("More than one element");
   }
 
   E min([int compare(E a, E b)]) => IterableMixinWorkaround.min(this, compare);
 
   E max([int compare(E a, E b)]) => IterableMixinWorkaround.max(this, compare);
 
-  List<E> toList({ bool growable: false}) {
+  List<E> toList({ bool growable: true}) {
     return new List<E>.from(this, growable: growable);
   }
 
   Set<E> toSet() {
     return new Set<E>.from(this);
   }
 }
 
 
 // This is essentially the same class as _ObjectArray, but it does not
@@ skipping 218 matching lines @@
   E get single {
     if (length == 1) return this[0];
     if (length == 0) throw new StateError("No elements");
     throw new StateError("More than one element");
   }
 
   E min([int compare(E a, E b)]) => IterableMixinWorkaround.min(this, compare);
 
   E max([int compare(E a, E b)]) => IterableMixinWorkaround.max(this, compare);
 
-  List<E> toList({ bool growable: false }) {
+  List<E> toList({ bool growable: true }) {
     return new List<E>.from(this, growable: growable);
   }
 
   Set<E> toSet() {
     return new Set<E>.from(this);
   }
 }
 
 
 // Iterator for arrays with fixed size.
@@ skipping 17 matching lines @@
     }
     _position = _length;
     _current = null;
     return false;
   }
 
   E get current {
     return _current;
   }
 }