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

sdk/lib/core/iterable.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.
 
 part of dart.core;
 
 /**
  * The [Iterable] interface allows to get an [Iterator] out of an
  * [Iterable] object.
  *
@@ skipping 138 matching lines @@
    * Returns true if one element of this collection satisfies the
    * predicate [f]. Returns false otherwise.
    */
   bool any(bool f(E element)) {
     for (E element in this) {
       if (f(element)) return true;
     }
     return false;
   }
 
-  List<E> toList({ bool growable: false }) =>
+  List<E> toList({ bool growable: true }) =>
       new List<E>.from(this, growable: growable);
   Set<E> toSet() => new Set<E>.from(this);
 
   /**
    * Returns the number of elements in [this].
    *
    * Counting all elements may be involve running through all elements and can
    * therefore be slow.
    */
   int get length {
@@ skipping 263 matching lines @@
  */
 abstract class BidirectionalIterator<T> extends Iterator<T> {
   /**
    * Move back to the previous element.
    *
    * Returns true and updates [current] if successful. Returns false
    * and sets [current] to null if there is no previous element.
    */
   bool movePrevious();
 }