Issue 3515 - Adapted polyfill for URL class for consistency

lib/url.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
  * 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/>.
  */
 
 /** @module url */
 
-window.URL = (function()
-{
-  let URL = window.URL || window.webkitURL;
-  let URLProperties = ["href", "protocol", "host", "hostname", "pathname", "search"];
-
-  if (!URL || !URLProperties.every(prop => prop in new URL("about:blank")))
-  {
-    let doc = document.implementation.createHTMLDocument();
-
-    let base = doc.createElement("base");
-    doc.head.appendChild(base);
-
-    let anchor = doc.createElement("a");
-    doc.body.appendChild(anchor);
-
-    URL = function(url, baseUrl)
-    {
-      if (baseUrl instanceof URL)
-        base.href = baseUrl.href;
-      else
-        base.href = baseUrl || "";
-      anchor.href = url;
-
-      for (let prop of URLProperties)
-        this[prop] = anchor[prop];
-    };
-  }
-
-  return URL;
-})();
-
 /**
  * Gets the IDN-decoded hostname from a URL object.
  *
  * @param {URL} url
  * @return {string}
  * @static
  */
 function getDecodedHostname(url)
 {
   let hostname = url.hostname;
@@ skipping 97 matching lines @@
   documentHost = documentHost.replace(/\.+$/, "");
 
   if (requestHost == documentHost)
     return false;
 
   if (!isDomain(requestHost) || !isDomain(documentHost))
     return true;
 
   return getBaseDomain(requestHost) != getBaseDomain(documentHost);
 };