Issue 4580 - Replace ext.devtools with devtools

ext/content.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-present 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 31 matching lines @@
       if (queue)
       {
         for (let message of queue)
           backgroundFrame.contentWindow.postMessage(message, "*");
       }
       window.removeEventListener("message", loadHandler);
     }
   };
   window.addEventListener("message", loadHandler);
 
-  ext.backgroundPage = {
-    _sendRawMessage(message)
-    {
-      if (messageQueue)
-        messageQueue.push(message);
-      else
-        backgroundFrame.contentWindow.postMessage(message, "*");
-    }
-  };
-
   /* Polyfills */
 
   if (!("runtime" in chrome))
     chrome.runtime = {};
 
   chrome.runtime.sendMessage = (message, responseCallback) =>
   {
     let messageId = ++maxMessageId;
 
-    ext.backgroundPage._sendRawMessage({
-      type: "message",
-      messageId,
-      payload: message
-    });
+    let rawMessage = {type: "message", messageId, payload: message};
+
+    if (messageQueue)
+      messageQueue.push(rawMessage);
+    else
+      backgroundFrame.contentWindow.postMessage(rawMessage, "*");
 
     if (responseCallback)
     {
       let callbackWrapper = event =>
       {
         if (event.data.type == "response" && event.data.messageId == messageId)
         {
           window.removeEventListener("message", callbackWrapper);
           responseCallback(event.data.payload);
         }
       };
 
       window.addEventListener("message", callbackWrapper);
     }
   };
 }());