Made browser actions per tab on Safari

safari/ext/background.js

 /*
  * This file is part of Adblock Plus <http://adblockplus.org/>,
  * Copyright (C) 2006-2013 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 197 matching lines @@
     {
       var toolbarItem = safari.extension.toolbarItems[i];
 
       if (toolbarItem.browserWindow == win)
         return toolbarItem;
     }
 
     return null;
   };
 
-  var BrowserAction = function() {};
+  var BrowserAction = function(tab)
+  {
+    this._tab = tab;
+  };
   BrowserAction.prototype = {
     _set: function(name, value)
     {
       var currentWindow = this._tab._tab.browserWindow;
       var toolbarItem = getToolbarItemForWindow(currentWindow);
 
       if (toolbarItem)
       {
         var property = getToolbarItemProperty(name);
         property.tabs.set(this._tab, value);
@@ skipping 394 matching lines @@
   };
 
   ext.onMessage = new BackgroundMessageEventTarget();
 
   // TODO: Implement context menu
   ext.contextMenus = {
     create: function(title, contexts, onclick) {},
     removeAll: function(callback) {}
   };
 })();