Issue 4962 - Fix the tests.- Fix syntax in chrome/content/elemHideEmulation.js to use ES5Regress…

test/browser/elemHideEmulation.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 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 111 matching lines @@
     },
     function(selectors)
     {
       if (!selectors.length)
         return;
       var selector = selectors.join(", ");
       insertStyleRule(selector + "{display: none !important;}");
     }
   );
 
-  elemHideEmulation.load(function()
-  {
-    elemHideEmulation.apply();
-    callback();
-  });
+  elemHideEmulation.apply();
+  callback();
 }
 
 exports.testVerbatimPropertySelector = function(test)
 {
   var toHide = createElementWithStyle("{background-color: #000}");
   applyElemHideEmulation(
     ["[-abp-properties='background-color: rgb(0, 0, 0)']"],
     function()
     {
       expectHidden(test, toHide);
@@ skipping 64 matching lines @@
       expectVisible(test, toHide);
       insertStyleRule("#" + toHide.id + " {background-color: #000}");
       window.setTimeout(function()
       {
         expectHidden(test, toHide);
         test.done();
       }, 0);
     }
   );
 };