Issue 3868 - Use the new FilterNotifier API

stats.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 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 63 matching lines @@
     showIconNumber.setAttribute("aria-checked", Prefs.show_statsinicon);
     showIconNumber.addEventListener("click", toggleIconNumber, false);
     document.querySelector("label[for='show-iconnumber']").addEventListener("click", toggleIconNumber, false);
     
     // Update stats
     ext.pages.query({active: true, lastFocusedWindow: true}, function(pages)
     {
       currentPage = pages[0];
       updateStats();
 
-      FilterNotifier.addListener(onNotify);
+      FilterNotifier.on("filter.hitCount", updateStats);
 
       document.getElementById("stats-container").removeAttribute("hidden");
     });
   }
   
   function onUnload()
   {
-    FilterNotifier.removeListener(onNotify);
-  }
-  
-  function onNotify(action, item)
-  {
-    if (action == "filter.hitCount")
-      updateStats();
+    FilterNotifier.off("filter.hitCount", updateStats);
   }
   
   function updateStats()
   {
     var statsPage = document.getElementById("stats-page");
     var blockedPage = getBlockedPerPage(currentPage).toLocaleString();
     i18n.setElementText(statsPage, "stats_label_page", [blockedPage]);
     
     var statsTotal = document.getElementById("stats-total");
     var blockedTotal = Prefs.blocked_total.toLocaleString();
@@ skipping 14 matching lines @@
   
   function toggleIconNumber()
   {
     Prefs.show_statsinicon = !Prefs.show_statsinicon;
     document.getElementById("show-iconnumber").setAttribute("aria-checked", Prefs.show_statsinicon);
   }
   
   document.addEventListener("DOMContentLoaded", onLoad, false);
   window.addEventListener("unload", onUnload, false);
 })();