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

chrome/renderer/resources/extensions/permissions_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 Permissions API.
 
 var binding = require('binding').Binding.create('permissions');
 
 var Event = require('event_bindings').Event;
-var sendRequest = require('sendRequest').sendRequest;
 
 // These custom binding are only necessary because it is not currently
 // possible to have a union of types as the type of the items in an array.
 // Once that is fixed, this entire file should go away.
 // See,
 // https://code.google.com/p/chromium/issues/detail?id=162044
 // https://code.google.com/p/chromium/issues/detail?id=162042
 // TODO(bryeung): delete this file.
 binding.registerCustomHook(function(api) {
   var apiFunctions = api.apiFunctions;
@@ skipping 68 matching lines @@
     for (var i = 0; i < args[0].permissions.length; i += 1) {
       args[0].permissions[i] = maybeConvertToObject(args[0].permissions[i]);
     }
     $Function.call(Event.prototype.dispatchToListener, this, callback, args);
   };
   permissions.onRemoved.dispatchToListener =
       permissions.onAdded.dispatchToListener;
 });
 
 exports.binding = binding.generate();