Make miscellaneous_bindings and event_bindings Required as needed. Previously

chrome/renderer/resources/extensions/tabs_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 binding for the tabs API.
 
 var binding = require('binding').Binding.create('tabs');
 
+var miscBindings = require('miscellaneous_bindings');
 var tabsNatives = requireNative('tabs');
 var OpenChannelToTab = tabsNatives.OpenChannelToTab;
 var sendRequestIsDisabled = requireNative('process').IsSendRequestDisabled();
 
-var chromeHidden = requireNative('chrome_hidden').GetChromeHidden();
-
 binding.registerCustomHook(function(bindingsAPI, extensionId) {
   var apiFunctions = bindingsAPI.apiFunctions;
   var tabs = bindingsAPI.compiledApi;
 
   apiFunctions.setHandleRequest('connect', function(tabId, connectInfo) {
     var name = '';
     if (connectInfo) {
       name = connectInfo.name || name;
     }
     var portId = OpenChannelToTab(tabId, extensionId, name);
-    return chromeHidden.Port.createPort(portId, name);
+    return miscBindings.createPort(portId, name);
   });
 
   apiFunctions.setHandleRequest('sendRequest',
                                 function(tabId, request, responseCallback) {
     if (sendRequestIsDisabled)
       throw new Error(sendRequestIsDisabled);
-    var port = tabs.connect(tabId, {name: chromeHidden.kRequestChannel});
-    chromeHidden.Port.sendMessageImpl(port, request, responseCallback);
+    var port = tabs.connect(tabId, {name: miscBindings.kRequestChannel});
+    miscBindings.sendMessageImpl(port, request, responseCallback);
   });
 
   apiFunctions.setHandleRequest('sendMessage',
                                 function(tabId, message, responseCallback) {
-    var port = tabs.connect(tabId, {name: chromeHidden.kMessageChannel});
-    chromeHidden.Port.sendMessageImpl(port, message, responseCallback);
+    var port = tabs.connect(tabId, {name: miscBindings.kMessageChannel});
+    miscBindings.sendMessageImpl(port, message, responseCallback);
   });
 });
 
 exports.binding = binding.generate();