Add support for DateTimeFormat.formatToParts

src/js/datetime-format-to-parts.js

Index: src/js/datetime-format-to-parts.js
diff --git a/src/js/datetime-format-to-parts.js b/src/js/datetime-format-to-parts.js
new file mode 100644
index 0000000000000000000000000000000000000000..3194f50672cddd113a22e5888ff2f0169427434c
--- /dev/null
+++ b/src/js/datetime-format-to-parts.js
@@ -0,0 +1,16 @@
+// Copyright 2016 the V8 project authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+(function(global, utils) {
+"use strict";
+
+%CheckIsBootstrapping();
+
+var GlobalIntl = global.Intl;
+var FormatDateToParts = utils.ImportNow("FormatDateToParts");
+
+utils.InstallFunctions(GlobalIntl.DateTimeFormat.prototype,  DONT_ENUM, [
+    'formatToParts', FormatDateToParts
+]);
+})