Fixing DataTransferItemList List<> behavior

sdk/lib/html/dartium/html_dartium.dart

Index: sdk/lib/html/dartium/html_dartium.dart
diff --git a/sdk/lib/html/dartium/html_dartium.dart b/sdk/lib/html/dartium/html_dartium.dart
index 29a417ad3c74a7c287a970a80822a308d7bde81f..a1e9e52a99d9be589ee140b16819ea086200d137 100644
--- a/sdk/lib/html/dartium/html_dartium.dart
+++ b/sdk/lib/html/dartium/html_dartium.dart
@@ -6894,12 +6894,10 @@ class DataTransferItem extends NativeFieldWrapperClass2 {
   Entry getAsEntry() native "DataTransferItem_webkitGetAsEntry_Callback";
 
 }
-// Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
+// 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.
 
-// WARNING: Do not edit - generated code.
-
 
 @DocsEditable()
 @DomName('DataTransferItemList')
@@ -6949,6 +6947,11 @@ class DataTransferItemList extends NativeFieldWrapperClass2 {
   @Experimental() // untriaged
   void remove(int index) native "DataTransferItemList_remove_Callback";
 
+
+  DataTransferItem operator[] (int index) {
+    return __getter__(index);
+  }
+
 }
 // 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