Implement a module system for the extension bindings JS.

chrome/renderer/resources/extensions/json_schema.js

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // -----------------------------------------------------------------------------
 // NOTE: If you change this file you need to touch renderer_resources.grd to
 // have your change take effect.
 // -----------------------------------------------------------------------------
 
 //==============================================================================
@@ skipping 20 matching lines @@
 // There are also these departures from the JSON Schema proposal:
 // - function and undefined types are supported
 // - null counts as 'unspecified' for optional values
 // - added the 'choices' property, to allow specifying a list of possible types
 //   for a value
 // - by default an "object" typed schema does not allow additional properties.
 //   if present, "additionalProperties" is to be a schema against which all
 //   additional properties will be validated.
 //==============================================================================
 
-(function() {
-native function GetChromeHidden();
-var chromeHidden = GetChromeHidden();
+var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
 
 function isInstanceOfClass(instance, className) {
   if (!instance)
     return false;
 
   if (Object.prototype.toString.call(instance) == "[object " + className + "]")
     return true;
 
   return isInstanceOfClass(Object.getPrototypeOf(instance), className);
 }
@@ skipping 437 matching lines @@
     message: chromeHidden.JSONSchemaValidator.formatError(key, replacements)
   });
 };
 
 /**
  * Resets errors to an empty list so you can call 'validate' again.
  */
 chromeHidden.JSONSchemaValidator.prototype.resetErrors = function() {
   this.errors = [];
 };
-
-})();