Add support for DateTimeFormat.formatToParts

src/js/i18n.js

 // Copyright 2013 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.
 
 // ECMAScript 402 API implementation.
 
 /**
  * Intl object is a single object that has some named properties,
  * all of which are constructors.
  */
@@ skipping 1781 matching lines @@
   } else {
     dateMs = TO_NUMBER(dateValue);
   }
 
   if (!NUMBER_IS_FINITE(dateMs)) throw %make_range_error(kDateRange);
 
   return %InternalDateFormat(%GetImplFromInitializedIntlObject(formatter),
                              new GlobalDate(dateMs));
 }
 
+function formatDateToParts(formatter, dateValue) {
+  var dateMs;
+  if (IS_UNDEFINED(dateValue)) {
+    dateMs = %DateCurrentTime();
+  } else {
+    dateMs = TO_NUMBER(dateValue);
+  }
+
+  if (!NUMBER_IS_FINITE(dateMs)) throw %make_range_error(kDateRange);
+
+  return %InternalDateFormatToParts(
+      %GetImplFromInitializedIntlObject(formatter), new GlobalDate(dateMs));
+}
+
 
 /**
  * Returns a Date object representing the result of calling ToString(value)
  * according to the effective locale and the formatting options of this
  * DateTimeFormat.
  * Returns undefined if date string cannot be parsed.
  */
 function IntlParseDate(formatter, value) {
   return %InternalDateParse(%GetImplFromInitializedIntlObject(formatter),
                             TO_STRING(value));
 }
 
 
 // 0 because date is optional argument.
 AddBoundMethod(Intl.DateTimeFormat, 'format', formatDate, 0, 'dateformat');
+AddBoundMethod(Intl.DateTimeFormat, 'formatToParts', formatDateToParts, 0,
+               'dateformat');
 
 
 /**
  * Returns canonical Area/Location(/Location) name, or throws an exception
  * if the zone name is invalid IANA name.
  */
 function canonicalizeTimeZoneID(tzID) {
   // Skip undefined zones.
   if (IS_UNDEFINED(tzID)) {
     return tzID;
@@ skipping 466 matching lines @@
   }
 );
 
 utils.Export(function(to) {
   to.AddBoundMethod = AddBoundMethod;
   to.IntlParseDate = IntlParseDate;
   to.IntlParseNumber = IntlParseNumber;
 });
 
 })