Issue 1841 - Replaced URI class with built-in URL objects

lib/url.js

Index: lib/url.js
===================================================================
new file mode 100644
--- /dev/null
+++ b/lib/url.js
@@ -0,0 +1,47 @@
+/*
+ * 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/>.
+ */
+
+window.URL = (function()
+{
+  let URL = window.URL || window.webkitURL;
+  let URLProperties = ["href", "protocol", "host", "hostname", "port", "pathname", "search"];
+
+  if (!URL || !URLProperties.every(prop => prop in new URL("")))
+  {
+    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;
+})();