Issue 3208 - Send Private Browsing flag separately from the frame structure

lib/elemHide.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 204 matching lines @@
       fakeFrame = {
         parent: fakeFrame,
         location: {
           href: message.frames[i].location
         },
         document: {
           documentElement: {}
         },
         QueryInterface: function() {return this;},
         getInterface: function() {return this;},
-        usePrivateBrowsing: (fakeFrame ? fakeFrame.usePrivateBrowsing : message.frames[i].privateBrowsing)
+        usePrivateBrowsing: message.isPrivate
       };
       fakeFrame.top = fakeFrame.parent || fakeFrame;
       if (!fakeFrame.parent)
         fakeFrame.parent = fakeFrame;
 
       let sitekey = message.frames[i].sitekey || null;
       fakeFrame.document.documentElement.getAttribute = function(attr)
       {
         if (attr == "data-adblockkey")
           return sitekey;
@@ skipping 202 matching lines @@
       let filter = filterByKey[key];
       if (specificOnly && (!filter.domains || filter.domains[""]))
         continue;
 
       if (filter.isActiveOnDomain(domain) && !this.getException(filter, domain))
         result.push(filter.selector);
     }
     return result;
   }
 };