Update dart:collection.

tool/input_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 278 matching lines @@
     _list._insertBefore(_next, entry, updateFirst: false);
   }
 
   /**
    * 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._insertBefore(this as E, entry, updateFirst: true);
+    _list._insertBefore(this as dynamic/*=E*/, entry, updateFirst: true);
   }
 }