Add List.reversed to give a reverse fixed-length view of a list.

sdk/lib/_internal/compiler/implementation/lib/js_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.
 
 part of _interceptors;
 
 /**
  * The interceptor class for [List]. The compiler recognizes this
  * class as an interceptor, and changes references to [:this:] to
  * actually use the receiver of the method, which is generated as an extra
@@ skipping 203 matching lines @@
       throw new RangeError.value(start + length);
     }
 
     Arrays.copy(from, startFrom, this, start, length);
   }
 
   bool any(bool f(E element)) => IterableMixinWorkaround.any(this, f);
 
   bool every(bool f(E element)) => IterableMixinWorkaround.every(this, f);
 
+  List<E> get reversed => new ReversedList<E>(this, 0, length);
+
   void sort([int compare(E a, E b)]) {
     checkMutable(this, 'sort');
     if (compare == null) compare = Comparable.compare;
     coreSort(this, compare);
   }
 
   int indexOf(E element, [int start = 0]) {
     if (start is !int) throw new ArgumentError(start);
     return Arrays.indexOf(this, element, start, length);
   }
@@ skipping 66 matching lines @@
     if (nextPosition < length) {
       _position = nextPosition;
       _current = _list[nextPosition];
       return true;
     }
     _position = length;
     _current = null;
     return false;
   }
 }