Mark i18n functions as native and set proper names

src/extensions/i18n/date-format.js

 // Copyright 2013 the V8 project authors. All rights reserved.
 // Redistribution and use in source and binary forms, with or without
 // modification, are permitted provided that the following conditions are
 // met:
 //
 //     * Redistributions of source code must retain the above copyright
 //       notice, this list of conditions and the following disclaimer.
 //     * Redistributions in binary form must reproduce the above
 //       copyright notice, this list of conditions and the following
 //       disclaimer in the documentation and/or other materials provided
@@ skipping 359 matching lines @@
     addWECPropertyIfDefined(result, 'weekday', fromPattern.weekday);
     addWECPropertyIfDefined(result, 'hour12', fromPattern.hour12);
     addWECPropertyIfDefined(result, 'hour', fromPattern.hour);
     addWECPropertyIfDefined(result, 'minute', fromPattern.minute);
     addWECPropertyIfDefined(result, 'second', fromPattern.second);
 
     return result;
   },
   ATTRIBUTES.DONT_ENUM
 );
+%FunctionSetName(Intl.DateTimeFormat.prototype.resolvedOptions,
+                 'resolvedOptions');
 %FunctionRemovePrototype(Intl.DateTimeFormat.prototype.resolvedOptions);
+%SetNativeFlag(Intl.DateTimeFormat.prototype.resolvedOptions);
 
 
 /**
  * Returns the subset of the given locale list for which this locale list
  * has a matching (possibly fallback) locale. Locales appear in the same
  * order in the returned list as in the input list.
  * Options are optional parameter.
  */
 %SetProperty(Intl.DateTimeFormat, 'supportedLocalesOf', function(locales) {
     if (%_IsConstructCall()) {
       throw new TypeError(ORDINARY_FUNCTION_CALLED_AS_CONSTRUCTOR);
     }
 
     return supportedLocalesOf('dateformat', locales, arguments[1]);
   },
   ATTRIBUTES.DONT_ENUM
 );
+%FunctionSetName(Intl.DateTimeFormat.supportedLocalesOf, 'supportedLocalesOf');
 %FunctionRemovePrototype(Intl.DateTimeFormat.supportedLocalesOf);
+%SetNativeFlag(Intl.DateTimeFormat.supportedLocalesOf);
 
 
 /**
  * Returns a String value representing the result of calling ToNumber(date)
  * according to the effective locale and the formatting options of this
  * DateTimeFormat.
  */
 function formatDate(formatter, dateValue) {
   native function NativeJSInternalDateFormat();
 
@@ skipping 55 matching lines @@
 
   var result = toTitleCaseWord(match[1]) + '/' + toTitleCaseWord(match[2]);
   var i = 3;
   while (match[i] !== undefined && i < match.length) {
     result = result + '_' + toTitleCaseWord(match[i]);
     i++;
   }
 
   return result;
 }