adblockplusopera: Update code from ABP for Chrome

background.js

Index: background.js
===================================================================
--- a/background.js
+++ b/background.js
@@ -1,14 +1,18 @@
-var ElemHide = require("elemHide").ElemHide;
-var DownloadableSubscription = require("subscriptionClasses").DownloadableSubscription;
-var WhitelistFilter = require("filterClasses").WhitelistFilter;
-var Filter = require("filterClasses").Filter;
+with(require("filterClasses"))
+{
+  this.Filter = Filter;
+  this.WhitelistFilter = WhitelistFilter;
+}
+with(require("subscriptionClasses"))
+{
+  this.Subscription = Subscription;
+  this.DownloadableSubscription = DownloadableSubscription;
+}
 var FilterNotifier = require("filterNotifier").FilterNotifier;
 var FilterStorage = require("filterStorage").FilterStorage;
-var Prefs = require("prefs").Prefs;
+var ElemHide = require("elemHide").ElemHide;
+var defaultMatcher = require("matcher").defaultMatcher;
 var Synchronizer = require("synchronizer").Synchronizer;
-var Subscription = require("subscriptionClasses").Subscription;
-var SpecialSubscription = require("subscriptionClasses").SpecialSubscription;
-var Utils = require("utils").Utils;
 
 var isFirstRun = false;
 FilterNotifier.addListener(function(action)