Issue 7452 - Do not cache element hiding filter objects by default

test/filterListener.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present 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 65 matching lines @@
                      "Keyword of filter " + filter.text);
           filters.push(filter.text);
         }
       }
     }
     result[type] = filters;
   }
 
   let elemHide = sandboxedRequire("../lib/elemHide");
   result.elemhide = [];
-  for (let filter of elemHide.knownFilters)
-    result.elemhide.push(filter.text);
+  for (let filterText of elemHide.knownFilters)
+    result.elemhide.push(filterText);
 
   let elemHideExceptions = sandboxedRequire("../lib/elemHideExceptions");
   result.elemhideexception = [];
   for (let exception of elemHideExceptions.knownExceptions)
     result.elemhideexception.push(exception.text);
 
   let elemHideEmulation = sandboxedRequire("../lib/elemHideEmulation");
   result.elemhideemulation = [];
   for (let filter of elemHideEmulation.filters)
     result.elemhideemulation.push(filter.text);
@@ skipping 269 matching lines @@
   checkKnownFilters(test, "add special subscription with filter2", {snippets: [filter1.text, filter2.text]});
 
   let subscription4 = Subscription.fromURL("https://easylist-downloads.adblockplus.org/abp-filters-anti-cv.txt");
   subscription4.addFilter(filter3);
 
   filterStorage.addSubscription(subscription4);
   checkKnownFilters(test, "add ABP anti-circumvention subscription with filter3", {snippets: [filter1.text, filter2.text, filter3.text]});
 
   test.done();
 };