Issue 2257 - Replaced non-standard function expressions with ES6 arrow functions

chrome/content/ui/filters-backup.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 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
@@ skipping 175 matching lines @@
           let match = /\[Adblock(?:\s*Plus\s*([\d\.]+)?)?\]/i.exec(line);
           if (match)
           {
             let warning = E("backupButton").getAttribute("_restoreCustomWarning");
             let minVersion = match[1];
             if (minVersion && Utils.versionComparator.compare(minVersion, Utils.addonVersion) > 0)
               warning += "\n\n" + E("backupButton").getAttribute("_restoreVersionWarning");
 
             if (Utils.confirm(window, warning, E("backupButton").getAttribute("_restoreDialogTitle")))
             {
-              let subscriptions = FilterStorage.subscriptions.filter(function(s) s instanceof SpecialSubscription);
+              let subscriptions = FilterStorage.subscriptions.filter(s => s instanceof SpecialSubscription);
               for (let i = 0; i < subscriptions.length; i++)
                 FilterStorage.removeSubscription(subscriptions[i]);
 
               return;
             }
             else
               throw Cr.NS_BASE_STREAM_WOULD_BLOCK;
           }
           else
             throw new Error("Invalid file");
@@ skipping 76 matching lines @@
   backupAllData: function(/**nsIFile*/ file)
   {
     FilterStorage.saveToDisk(file);
   },
 
   /**
    * Writes user's custom filters to a file.
    */
   backupCustomFilters: function(/**nsIFile*/ file)
   {
-    let subscriptions = FilterStorage.subscriptions.filter(function(s) s instanceof SpecialSubscription);
+    let subscriptions = FilterStorage.subscriptions.filter(s => s instanceof SpecialSubscription);
     let minVersion = "2.0"
     let list = [];
     for (let i = 0; i < subscriptions.length; i++)
     {
       let subscription = subscriptions[i];
       let typeAddition = "";
       if (subscription.defaults)
         typeAddition = "/" + subscription.defaults.join("/");
       list.push("! [" + subscription.title + "]" + typeAddition);
       for (let j = 0; j < subscription.filters.length; j++)
@@ skipping 29 matching lines @@
         Utils.alert(window, E("backupButton").getAttribute("_backupError"), E("backupButton").getAttribute("_backupDialogTitle"));
       }
     });
   }
 };
 
 window.addEventListener("load", function()
 {
   Backup.init();
 }, false);