Lazy load chrome.* APIs

chrome/renderer/resources/extensions/file_browser_private_custom_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.
 
-// Custom bindings for the fileBrowserPrivate API.
+// Custom binding for the fileBrowserPrivate API.
+
+var binding = require('binding').Binding.create('fileBrowserPrivate');
 
 var fileBrowserPrivateNatives = requireNative('file_browser_private');
 var GetLocalFileSystem = fileBrowserPrivateNatives.GetLocalFileSystem;
 
 var fileBrowserNatives = requireNative('file_browser_handler');
 var GetExternalFileEntry = fileBrowserNatives.GetExternalFileEntry;
 
-var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
-
-chromeHidden.registerCustomHook('fileBrowserPrivate', function(bindingsAPI) {
+binding.registerCustomHook(function(bindingsAPI) {
   var apiFunctions = bindingsAPI.apiFunctions;
 
   apiFunctions.setCustomCallback('requestLocalFileSystem',
                                  function(name, request, response) {
     var fs = null;
     if (response && !response.error)
       fs = GetLocalFileSystem(response.name, response.path);
     if (request.callback)
       request.callback(fs);
     request.callback = null;
@@ skipping 28 matching lines @@
 
     // So |request.callback| doesn't break if response is not defined.
     if (!response)
       response = {};
 
     if (request.callback)
       request.callback(response);
     request.callback = null;
   });
 });
+
+exports.binding = binding.generate();