Issue 1772 - [JSHydra] Convert const to var for Chrome

autotest/test_abprewrite.js.expected

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2014 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/>.
  */
 
 //
 // This file has been generated automatically, relevant repositories:
 // * https://hg.adblockplus.org/jshydra/
 //
 
-const Cl = Components.unknown;
+var Cl = Components.unknown;
 var Utils = require("utils").Utils;
 var _tempVar0 = require("filterClasses");
 var Filter = _tempVar0.Filter;
 var BlockingFilter = _tempVar0.BlockingFilter;
 var foo;
 var bar = 2;
 var bas;
+var FOO = "FOO";
 var _tempVar1 = foo();
 var a = _tempVar1[0];
 var b = _tempVar1[1];
 var _tempVar2 = [1, 2];
 a = _tempVar2[0];
 b = _tempVar2[1];
 var y = foo().x;
 var _tempVar3 = foo();
 var v1 = _tempVar3.k1;
 var v2 = _tempVar3.k2;
@@ skipping 102 matching lines @@
 {
   return this[a] + b;
 }.bind(this);
 x = function(a, b)
 {
   return function()
   {
     return 1;
   };
 }.bind(this);