[i18n] Avoid name conflicts caused by naive minifier

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 58 matching lines @@
   // property on each JSFunction instance created here, rather
   // than (as utils.InstallGetter would) on the SharedFunctionInfo
   // associated with all functions returned from AddBoundMethod.
   var getter = ANONYMOUS_FUNCTION(function() {
     if (!%IsInitializedIntlObjectOfType(this, type)) {
       throw %make_type_error(kMethodCalledOnWrongObject, methodName);
     }
     if (IS_UNDEFINED(this[internalName])) {
       var boundMethod;
       if (IS_UNDEFINED(length) || length === 2) {
-        boundMethod = ANONYMOUS_FUNCTION((x, y) => implementation(this, x, y));
+        boundMethod = ANONYMOUS_FUNCTION((fst, snd) => implementation(this, fst, snd));

[Yang, 2016/10/12 04:56:55]

can we keep the 80-char limit?

[jgruber, 2016/10/12 06:55:08]

Done.

       } else if (length === 1) {
-        boundMethod = ANONYMOUS_FUNCTION(x => implementation(this, x));
+        boundMethod = ANONYMOUS_FUNCTION(fst => implementation(this, fst));
       } else {
         boundMethod = ANONYMOUS_FUNCTION((...args) => {
           // DateTimeFormat.format needs to be 0 arg method, but can still
           // receive an optional dateValue param. If one was provided, pass it
           // along.
           if (args.length > 0) {
             return implementation(this, args[0]);
           } else {
             return implementation(this);
           }
@@ skipping 2176 matching lines @@
   }
 );
 
 %FunctionRemovePrototype(FormatDateToParts);
 
 utils.Export(function(to) {
   to.FormatDateToParts = FormatDateToParts;
 });
 
 })