Recommit changing List.skip/take/revert returns Iterable and remove mappedBy.

sdk/lib/core/list.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.
 
 part of dart.core;
 
 /**
  * A [List] is an indexable collection with a length. It can be of
  * fixed size or extendable.
  */
@@ skipping 59 matching lines @@
   void addLast(E value);
 
   /**
    * Appends all elements of the [iterable] to the end of this list.
    * Extends the length of the list by the number of elements in [iterable].
    * Throws an [UnsupportedError] if this list is not extensible.
    */
   void addAll(Iterable<E> iterable);
 
   /**
-   * Returns a reversed fixed-length view of this [List].
-   *
-   * The reversed list has elements in the opposite order of this list.
-   * It is backed by this list, but will stop working if this list
-   * becomes shorter than its current length.
+   * Returns an [Iterable] of the elements of this [List] in reverse order.
    */
-  List<E> get reversed;
+  Iterable<E> get reversed;
 
   /**
    * Sorts the list according to the order specified by the [compare] function.
    *
    * The [compare] function must act as a [Comparator].
    * The default [List] implementations use [Comparable.compare] if
    * [compare] is omitted.
    */
   void sort([int compare(E a, E b)]);
 
@@ skipping 87 matching lines @@
    * not extendable.
    * If [length] is 0, this method does not do anything.
    * If [start] is the length of the list, this method inserts the
    * range at the end of the list.
    * Throws an [ArgumentError] if [length] is negative.
    * Throws an [RangeError] if [start] is negative or if
    * [start] is greater than the length of the list.
    */
   void insertRange(int start, int length, [E fill]);
 }