Issue 1985 - Replaced __proto__ with Object.create() and Object.getPrototypeOf()

lib/whitelisting.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 63 matching lines @@
 
   return verifySignature(key, signature, params.join("\0"));
 }
 
 function recordKey(page, url, key)
 {
   let urlsWithKey = pagesWithKey.get(page);
 
   if (!urlsWithKey)
   {
-    urlsWithKey = {__proto__: null};
+    urlsWithKey = Object.create(null);
     pagesWithKey.set(page, urlsWithKey);
   }
 
   urlsWithKey[url] = key;
 }
 
 function processKey(token, page, frame)
 {
   let url = stripFragmentFromURL(frame.url);
 
   if (token.indexOf("_") < 0)
     return;
 
   let [key, signature] = token.split("_", 2);
   key = key.replace(/=/g, "");
 
   if (verifyKey(key, signature, url))
     recordKey(page, url, key);
 }
 exports.processKey = processKey;