Issue 5593 - Use messaging for the popup's notification code

popup.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present 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";
 
 let tab = null;
 
 function getPref(key, callback)
 {
   chrome.runtime.sendMessage({type: "prefs.get", key}, callback);
+}
+
+function setPref(key, value, callback)
+{
+  chrome.runtime.sendMessage({type: "prefs.set", key, value}, callback);
 }
 
 function togglePref(key, callback)
 {
   chrome.runtime.sendMessage({type: "prefs.toggle", key}, callback);
 }
 
 function isPageWhitelisted(callback)
 {
   chrome.runtime.sendMessage({type: "filters.isWhitelisted", tab}, callback);
@@ skipping 140 matching lines @@
 
 function toggleCollapse(event)
 {
   let collapser = event.currentTarget;
   let collapsible = document.getElementById(collapser.dataset.collapsible);
   collapsible.classList.toggle("collapsed");
   togglePref(collapser.dataset.option);
 }
 
 document.addEventListener("DOMContentLoaded", onLoad, false);