Issue 4864 - Start using ESLint for adblockpluschrome

chrome/ext/common.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 "use strict";
 
+(function()
 {
   // Workaround since HTMLCollection and NodeList didn't have iterator support
   // before Chrome 51.
   // https://bugs.chromium.org/p/chromium/issues/detail?id=401699
+  let arrayIterator = Array.prototype[Symbol.iterator];
   if (!(Symbol.iterator in HTMLCollection.prototype))
-    HTMLCollection.prototype[Symbol.iterator] = Array.prototype[Symbol.iterator];
+    HTMLCollection.prototype[Symbol.iterator] = arrayIterator;
   if (!(Symbol.iterator in NodeList.prototype))
-    NodeList.prototype[Symbol.iterator] = Array.prototype[Symbol.iterator];
+    NodeList.prototype[Symbol.iterator] = arrayIterator;
 
   /* Message passing */
 
   ext.onMessage = new ext._EventTarget();
 
 
   /* Background page */
 
   ext.backgroundPage = {
     sendMessage: chrome.runtime.sendMessage,
     getWindow()
     {
       return chrome.extension.getBackgroundPage();
     }
   };
 
 
   /* Utils */
 
   ext.getURL = chrome.extension.getURL;
   ext.i18n = chrome.i18n;
-}
+}());