Make hasNext a getter instead of a method.

runtime/lib/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.
 
 
 // TODO(srdjan): Use shared array implementation.
 class _ObjectArray<E> implements List<E> {
 
   factory _ObjectArray(int length) native "ObjectArray_allocate";
 
@@ skipping 280 matching lines @@
 }
 
 
 // Iterator for arrays with fixed size.
 class _FixedSizeArrayIterator<E> implements Iterator<E> {
   _FixedSizeArrayIterator(List array)
       : _array = array, _length = array.length, _pos = 0 {
     assert(array is _ObjectArray || array is _ImmutableArray);
   }
 
-  bool hasNext() {
+  bool get hasNext {
     return _length > _pos;
   }
 
   E next() {
-    if (!hasNext()) {
+    if (!hasNext) {
       throw const NoMoreElementsException();
     }
     return _array[_pos++];
   }
 
   final List<E> _array;
   final int _length;  // Cache array length for faster access.
   int _pos;
 }