Issue 3873 - Replace object literals using __proto__ with Object.create(null)

test/filterClasses.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 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 144 matching lines @@
     postInit(filter)
   let result = serializeFilter(filter);
   test.equal(result.sort().join("\n"), expected.sort().join("\n"), text);
 
   // Test round-trip
   let filter2;
   let buffer = [];
   filter.serialize(buffer);
   if (buffer.length)
   {
-    let map = {__proto__: null};
+    let map = Object.create(null);
     for (let line of buffer.slice(1))
     {
       if (/(.*?)=(.*)/.test(line))
         map[RegExp.$1] = RegExp.$2;
     }
     filter2 = Filter.fromObject(map);
   }
   else
   {
     filter2 = Filter.fromText(filter.text);
@@ skipping 160 matching lines @@
   compareFilter(test, "foo.com,~bar##[-abp-properties='abc']", ["type=cssrule", "text=foo.com,~bar##[-abp-properties='abc']", "selectorDomain=foo.com", "selector=[-abp-properties='abc']", "domains=FOO.COM|~BAR", "regexp=abc"]);
   compareFilter(test, "~foo.com,bar.com##[-abp-properties='abc']", ["type=cssrule", "text=~foo.com,bar.com##[-abp-properties='abc']", "selectorDomain=bar.com", "selector=[-abp-properties='abc']", "domains=BAR.COM|~FOO.COM", "regexp=abc"]);
 
   compareFilter(test, "##[-abp-properties='']", ["type=elemhide", "text=##[-abp-properties='']", "selector=[-abp-properties='']"]);
   compareFilter(test, "foo.com#@#[-abp-properties='abc']", ["type=elemhideexception", "text=foo.com#@#[-abp-properties='abc']", "selectorDomain=foo.com", "selector=[-abp-properties='abc']", "domains=FOO.COM"]);
   compareFilter(test, "foo.com##aaa [-abp-properties='abc'] bbb", ["type=cssrule", "text=foo.com##aaa [-abp-properties='abc'] bbb", "selectorDomain=foo.com", "selector=aaa [-abp-properties='abc'] bbb", "domains=FOO.COM", "prefix=aaa ", "regexp=abc", "suffix= bbb"]);
   compareFilter(test, "foo.com##[-abp-properties='|background-image: url(data:*)']", ["type=cssrule", "text=foo.com##[-abp-properties='|background-image: url(data:*)']", "selectorDomain=foo.com", "selector=[-abp-properties='|background-image: url(data:*)']", "domains=FOO.COM", "regexp=^background\\-image\\:\\ url\\(data\\:.*\\)"]);
 
   test.done();
 };