Implement List.getRange.

compiler/lib/implementation/array.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.
 
 class ArrayFactory {
   factory Array<E>.from(Iterable<E> other) {
     Array<E> array = new Array<E>();
     for (final e in other) {
       array.add(e);
     }
@@ skipping 171 matching lines @@
       throw new IndexOutOfRangeException(start + length);
     }
     _splice(start, length);
   }
 
   void insertRange(int start, int length, [T initialValue = null]) {
     throw const NotImplementedException();
   }
 
   List<T> getRange(int start, int length) {
-    throw const NotImplementedException();
+    if (length == 0) return [];
+    Arrays.rangeCheck(this, start, length);
+    return new List<T>.fromList(this, start, start + length);
   }
 
   int indexOf(T element, int startIndex) {
     return Arrays.indexOf(this, element, startIndex, this.length);
   }
 
   int lastIndexOf(T element, int startIndex) {
     return Arrays.lastIndexOf(this, element, startIndex);
   }
 
@@ skipping 100 matching lines @@
   }
 
   static Array _newArray(int len) native {
     return new Array(len);
   }
 
   static void _throwIndexOutOfRangeException(int index) native {
     throw new IndexOutOfRangeException(index);
   }
 }