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

autotest/test_abprewrite_module.js.expected

Index: autotest/test_abprewrite_module.js.expected
===================================================================
--- a/autotest/test_abprewrite_module.js.expected
+++ b/autotest/test_abprewrite_module.js.expected
@@ -18,24 +18,25 @@
 //
 // This file has been generated automatically, relevant repositories:
 // * https://hg.adblockplus.org/jshydra/
 //
 
 require.scopes["abprewrite_source"] = (function()
 {
   var exports = {};
-  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();