Move implementation from IterableBase to Iterable.

sdk/lib/collection/linked_list.dart

 // Copyright (c) 2013, 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.collection;
 
 
 /**
  * A specialized double-linked list of elements that extends [LinkedListEntry].
  *
@@ skipping 11 matching lines @@
  *
  * In return, each element knows its own place in the linked list, as well as
  * which list it is in. This allows constant time [LinkedListEntry.addAfter],
  * [LinkedListEntry.addBefore] and [LinkedListEntry.unlink] operations
  * when all you have is the element.
  *
  * A `LinkedList` also allows constant time adding and removing at either end,
  * and a constant time length getter.
  */
 class LinkedList<E extends LinkedListEntry<E>>
-    extends IterableBase<E>
+    extends Iterable<E>
     implements _LinkedListLink {
 
   int _modificationCount = 0;
   int _length = 0;
   _LinkedListLink _next;
   _LinkedListLink _previous;
 
   /**
    * Construct a new empty linked list.
    */
@@ skipping 231 matching lines @@
   /**
    * Insert an element before this element in this element's linked list.
    *
    * This entry must be in a linked list when this method is called.
    * The [entry] must not be in a linked list.
    */
   void insertBefore(E entry) {
     _list._insertAfter(_previous, entry);
   }
 }