Issue 4497 - Move Utils.getRequestWindow() into child/utils.js

lib/child/utils.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 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 101 matching lines @@
 };
 
 /**
  * Checks whether Private Browsing mode is enabled for a content window.
  * @return {Boolean}
  */
 let isPrivate = exports.isPrivate = function(/**Window*/ window)
 {
   return PrivateBrowsingUtils.isContentWindowPrivate(window);
 };
+
+/**
+ * Gets the DOM window associated with a particular request (if any).
+ */
+let getRequestWindow = exports.getRequestWindow = function(/**nsIChannel*/ channel) /**nsIDOMWindow*/
+{
+  try
+  {
+    if (channel.notificationCallbacks)
+      return channel.notificationCallbacks.getInterface(Ci.nsILoadContext).associatedWindow;
+  } catch(e) {}
+
+  try
+  {
+    if (channel.loadGroup && channel.loadGroup.notificationCallbacks)
+      return channel.loadGroup.notificationCallbacks.getInterface(Ci.nsILoadContext).associatedWindow;
+  } catch(e) {}
+
+  return null;
+};