Issue 3868 - Use the new FilterNotifier API

lib/whitelisting.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 73 matching lines @@
   return match(page, page.url, typeMask);
 };
 
 port.on("filters.isPageWhitelisted", (message, sender) =>
 {
   return !!checkWhitelisted(sender.page);
 });
 
 function revalidateWhitelistingState(page)
 {
-  FilterNotifier.triggerListeners(
+  FilterNotifier.emit(
     "page.WhitelistingStateRevalidate",
     page, checkWhitelisted(page)
   );
 }
 
-FilterNotifier.addListener(action =>
+FilterNotifier.on("filter.behaviorChanged", () =>
 {
-  if (action == "filter.behaviorChanged")
-    ext.pages.query({}, pages =>
-    {
-      for (let page of pages)
-        revalidateWhitelistingState(page);
-    });
+  ext.pages.query({}, pages =>
+  {
+    for (let page of pages)
+      revalidateWhitelistingState(page);
+  });
 });
 
 ext.pages.onLoading.addListener(revalidateWhitelistingState);
 
 let getKey =
 /**
  * Gets the public key, previously recorded for the given page
  * and frame, to be considered for the $sitekey filter option.
  *
  * @param {Page}  page
@@ skipping 55 matching lines @@
 
 if (typeof chrome == "object")
   chrome.webRequest.onHeadersReceived.addListener(
     onHeadersReceived,
     {
       urls: ["http://*/*", "https://*/*"],
       types: ["main_frame", "sub_frame"]
     },
     ["responseHeaders"]
   );