[builtins] Move StringLocaleCompare to a builtin.

src/js/string.js

 // Copyright 2012 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) {
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
@@ skipping 69 matching lines @@
   }
   if (index < 0) {
     return -1;
   }
   return %StringLastIndexOf(sub, pat, index);
 }
 
 %FunctionSetLength(StringLastIndexOf, 1);
 
 
-// ECMA-262 section 15.5.4.9
-//
-// This function is implementation specific.  For now, we do not
-// do anything locale specific.
-function StringLocaleCompareJS(other) {
-  CHECK_OBJECT_COERCIBLE(this, "String.prototype.localeCompare");
-
-  return %StringLocaleCompare(TO_STRING(this), TO_STRING(other));
-}
-
-
 // ES6 21.1.3.11.
 function StringMatchJS(pattern) {
   CHECK_OBJECT_COERCIBLE(this, "String.prototype.match");
 
   if (!IS_NULL_OR_UNDEFINED(pattern)) {
     var matcher = pattern[matchSymbol];
     if (!IS_UNDEFINED(matcher)) {
       return %_Call(matcher, pattern, this);
     }
   }
@@ skipping 596 matching lines @@
 ]);
 
 // Set up the non-enumerable functions on the String prototype object.
 utils.InstallFunctions(GlobalString.prototype, DONT_ENUM, [
   "codePointAt", StringCodePointAt,
   "concat", StringConcat,
   "endsWith", StringEndsWith,
   "includes", StringIncludes,
   "indexOf", StringIndexOf,
   "lastIndexOf", StringLastIndexOf,
-  "localeCompare", StringLocaleCompareJS,
   "match", StringMatchJS,
   "repeat", StringRepeat,
   "replace", StringReplace,
   "search", StringSearch,
   "slice", StringSlice,
   "split", StringSplitJS,
   "substring", StringSubstring,
   "substr", StringSubstr,
   "startsWith", StringStartsWith,
   "toLowerCase", StringToLowerCaseJS,
@@ skipping 25 matching lines @@
   to.StringLastIndexOf = StringLastIndexOf;
   to.StringMatch = StringMatchJS;
   to.StringReplace = StringReplace;
   to.StringSlice = StringSlice;
   to.StringSplit = StringSplitJS;
   to.StringSubstr = StringSubstr;
   to.StringSubstring = StringSubstring;
 });
 
 })