Issue 6665 - Optimize element hiding emulation filter lookups

test/filterListener.js

Index: test/filterListener.js
===================================================================
--- a/test/filterListener.js
+++ b/test/filterListener.js
@@ -27,17 +27,17 @@
 let SpecialSubscription = null;
 let ElemHideException = null;
 
 exports.setUp = function(callback)
 {
   sandboxedRequire = createSandbox({
     extraExports: {
       elemHide: ["knownFilters"],
-      elemHideEmulation: ["filters"]
+      elemHideEmulation: ["knownFilters"]
     }
   });
 
   // We need to require the filterListener module so that filter changes will be
   // noticed, even though we don't directly use the module here.
   sandboxedRequire("../lib/filterListener");
 
   (
@@ -86,17 +86,17 @@
     if (filter instanceof ElemHideException)
       result.elemhideexception.push(filter.text);
     else
       result.elemhide.push(filter.text);
   }
 
   let elemHideEmulation = sandboxedRequire("../lib/elemHideEmulation");
   result.elemhideemulation = [];
-  for (let filterText of elemHideEmulation.filters)
+  for (let {text: filterText} of elemHideEmulation.knownFilters)
     result.elemhideemulation.push(filterText);
 
   let types = ["blacklist", "whitelist", "elemhide", "elemhideexception",
                "elemhideemulation"];
   for (let type of types)
   {
     if (!(type in expected))
       expected[type] = [];