Cleanup: Fix some lint/style errors in extensions code.

chrome/renderer/resources/extensions/app_window_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 app_window API.
 
 var appWindowNatives = requireNative('app_window_natives');
 var runtimeNatives = requireNative('runtime');
 var Binding = require('binding').Binding;
 var Event = require('event_bindings').Event;
 var forEach = require('utils').forEach;
 var renderViewObserverNatives = requireNative('renderViewObserverNatives');
-var sendRequest = require('sendRequest').sendRequest;
 
 var appWindowData = null;
 var currentAppWindow = null;
 
 var appWindow = Binding.create('app.window');
 appWindow.registerCustomHook(function(bindingsAPI) {
   var apiFunctions = bindingsAPI.apiFunctions;
 
   apiFunctions.setCustomCallback('create',
                                  function(name, request, windowParams) {
@@ skipping 185 matching lines @@
 
 function onAppWindowClosed() {
   if (!currentAppWindow)
     return;
   dispatchEventIfExists(currentAppWindow, "onClosed");
 }
 
 exports.binding = appWindow.generate();
 exports.onAppWindowClosed = onAppWindowClosed;
 exports.updateAppWindowProperties = updateAppWindowProperties;