Clean up native context slots and add new ones.

src/json.js

 // Copyright 2009 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.
 
-var $jsonSerializeAdapter;
-
 (function(global, utils) {
 
 "use strict";
 
 %CheckIsBootstrapping();
 
 // -------------------------------------------------------------------
 // Imports
 
 var GlobalJSON = global.JSON;
@@ skipping 220 matching lines @@
 
 // Set up non-enumerable properties of the JSON object.
 utils.InstallFunctions(GlobalJSON, DONT_ENUM, [
   "parse", JSONParse,
   "stringify", JSONStringify
 ]);
 
 // -------------------------------------------------------------------
 // JSON Builtins
 
-$jsonSerializeAdapter = function(key, object) {
+function JsonSerializeAdapter(key, object) {
   var holder = {};
   holder[key] = object;
   // No need to pass the actual holder since there is no replacer function.
   return JSONSerialize(key, holder, UNDEFINED, new InternalArray(), "", "");
 }
 
+utils.ExportToRuntime(function(to) {
+  to.JsonSerializeAdapter = JsonSerializeAdapter;
+});
+
 })