Issue 154 - Added UI for devtools panel on Chrome

ext/content.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
- * Copyright (C) 2006-2015 Eyeo GmbH
+ * 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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
@@ skipping 33 matching lines @@
   global.ext.backgroundPage = {
     _sendRawMessage: function(message)
     {
       if (messageQueue)
         messageQueue.push(message);
       else
         backgroundFrame.contentWindow.postMessage(message, "*");
     },
     sendMessage: function(message, responseCallback)
     {
+      var messageId = ++maxMessageId;
+
       this._sendRawMessage({
         type: "message",
-        messageId: ++maxMessageId,
+        messageId: messageId,
         payload: message
       });
 
       if (responseCallback)
       {
         var callbackWrapper = function(event)
         {
-          if (event.data.type == "response" && event.data.messageId == rawMessage.messageId)
+          if (event.data.type == "response" && event.data.messageId == messageId)
           {
             window.removeEventListener("message", callbackWrapper, false);
             responseCallback(event.data.payload);
           }
         };
         window.addEventListener("message", callbackWrapper, false);
       }
     }
   };
 })(this);