Original review https://codereview.chromium.org/25855005.

src/i18n.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 1349 matching lines @@
     ldmlString += appendToLDMLString(option, {'2-digit': 'HH', 'numeric': 'H'});
   }
 
   option = getOption('minute', 'string', ['2-digit', 'numeric']);
   ldmlString += appendToLDMLString(option, {'2-digit': 'mm', 'numeric': 'm'});
 
   option = getOption('second', 'string', ['2-digit', 'numeric']);
   ldmlString += appendToLDMLString(option, {'2-digit': 'ss', 'numeric': 's'});
 
   option = getOption('timeZoneName', 'string', ['short', 'long']);
-  ldmlString += appendToLDMLString(option, {short: 'v', long: 'vv'});
+  ldmlString += appendToLDMLString(option, {short: 'z', long: 'zzzz'});
 
   return ldmlString;
 }
 
 
 /**
  * Returns either LDML equivalent of the current option or empty string.
  */
 function appendToLDMLString(option, pairs) {
   if (option !== undefined) {
@@ skipping 52 matching lines @@
       options, 'hour', match, {H: 'numeric', HH: '2-digit'});
 
   match = ldmlString.match(/m{1,2}/g);
   options = appendToDateTimeObject(
       options, 'minute', match, {m: 'numeric', mm: '2-digit'});
 
   match = ldmlString.match(/s{1,2}/g);
   options = appendToDateTimeObject(
       options, 'second', match, {s: 'numeric', ss: '2-digit'});
 
-  match = ldmlString.match(/v{1,2}/g);
+  match = ldmlString.match(/z|zzzz/g);
   options = appendToDateTimeObject(
-      options, 'timeZoneName', match, {v: 'short', vv: 'long'});
+      options, 'timeZoneName', match, {z: 'short', zzzz: 'long'});
 
   return options;
 }
 
 
 function appendToDateTimeObject(options, option, match, pairs) {
   if (match === null) {
     if (!options.hasOwnProperty(option)) {
       defineWEProperty(options, option, undefined);
     }
@@ skipping 651 matching lines @@
   writable: true,
   configurable: true,
   enumerable: false
 });
 %FunctionSetName($Date.prototype.toLocaleTimeString, 'toLocaleTimeString');
 %FunctionRemovePrototype($Date.prototype.toLocaleTimeString);
 %SetNativeFlag($Date.prototype.toLocaleTimeString);
 
 return Intl;
 }())});