Implement a module system for the extension bindings JS.

chrome/renderer/resources/extensions/schema_generated_bindings.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.
 
 // This script contains privileged chrome extension related javascript APIs.
 // It is loaded by pages whose URL has the chrome-extension protocol.
 
-var chrome = chrome || {};
-(function() {
-  native function GetChromeHidden();
-  native function GetExtensionAPIDefinition();
-  native function GetNextRequestId();
-  native function StartRequest();
-  native function SetIconCommon();
+  var GetChromeHidden = natives.GetChromeHidden;
+  var GetExtensionAPIDefinition = natives.GetExtensionAPIDefinition;
+  var GetNextRequestId = natives.GetNextRequestId;
+  var StartRequest = natives.StartRequest;
+  var SetIconCommon = natives.SetIconCommon;
 
   var chromeHidden = GetChromeHidden();
 
   if (!chrome)
     chrome = {};
 
   function apiExists(path) {
     var resolved = chrome;
     path.split(".").forEach(function(next) {
       if (resolved)
@@ skipping 548 matching lines @@
     // beginInstallWithManifest2.
     // See http://crbug.com/100242
     if (apiExists("webstorePrivate")) {
       chrome.webstorePrivate.beginInstallWithManifest2 =
           chrome.webstorePrivate.beginInstallWithManifest3;
     }
 
     if (apiExists("test"))
       chrome.test.getApiDefinitions = GetExtensionAPIDefinition;
   });
-})();