Use iterator, moveNext(), current.

runtime/lib/growable_array.dart

Index: runtime/lib/growable_array.dart
diff --git a/runtime/lib/growable_array.dart b/runtime/lib/growable_array.dart
index a34bca0bb77eb57e0a347677e57691b7df4aa3d2..bfd1964efa517e342a9a20a770405a9599df47ef 100644
--- a/runtime/lib/growable_array.dart
+++ b/runtime/lib/growable_array.dart
@@ -215,7 +215,5 @@ class _GrowableObjectArray<T> implements List<T> {
     return Collections.collectionToString(this);
   }
 
-  Iterator<T> iterator() {
-    return new SequenceIterator<T>(this);
-  }
+  Iterator<T> get iterator => new SequenceIterator<T>(this);
 }