Made Synchronizer tests work again

chrome/content/common.js

 const Cc = Components.classes;
 const Ci = Components.interfaces;
 const Cr = Components.results;
 const Cu = Components.utils;
 
+Cu.import("resource://gre/modules/XPCOMUtils.jsm");
 Cu.import("resource://gre/modules/Services.jsm");
 
 function require(module)
 {
   let result = {};
   result.wrappedJSObject = result;
   Services.obs.notifyObservers(result, "adblockplus-require", module);
   return result.exports;
 }
 
@@ skipping 18 matching lines @@
      BlockingFilter, WhitelistFilter, ElemHideBase, ElemHideFilter, ElemHideException} = require("filterClasses");
 let {Subscription, SpecialSubscription, RegularSubscription,
      ExternalSubscription, DownloadableSubscription} = require("subscriptionClasses");
 let {defaultMatcher, Matcher, CombinedMatcher} = require("matcher");
 let {FilterListener} = require("filterListener");
 let {FilterNotifier} = require("filterNotifier");
 let {FilterStorage} = require("filterStorage");
 let {ElemHide} = require("elemHide");
 let {Prefs} = require("prefs");
 let {RequestNotifier} = require("requestNotifier");
+let {Synchronizer} = require("synchronizer");
 let {UI} = require("ui");
 let {Utils} = require("utils");
 
 let geckoVersion = Services.appinfo.platformVersion;
 function compareGeckoVersion(version)
 {
   return Services.vc.compare(geckoVersion, version);
 }
 
 function prepareFilterComponents(keepListeners)
@@ skipping 190 matching lines @@
     return oldFinish.apply(this, arguments);
   }
   window.addEventListener("unload", function()
   {
     debuggerService.off();
   }, true);
   debuggerService.on();
   debuggerService.flags |= debuggerService.COLLECT_PROFILE_DATA;
   debuggerService.clearProfileData();
 }