Issue 4580 - Replace ext.backgroundPage.sendMessage with runtime.sendMessage

composer.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 19 matching lines @@
   }
   else if (event.keyCode == 13 && !event.shiftKey && !event.ctrlKey)
   {
     event.preventDefault();
     addFilters();
   }
 }
 
 function addFilters()
 {
-  ext.backgroundPage.sendMessage({
+  chrome.runtime.sendMessage({
     type: "filters.importRaw",
     text: document.getElementById("filters").value
   },
   errors =>
   {
     if (errors.length > 0)
       alert(errors.join("\n"));
     else
       closeDialog(true);
   });
 }
 
 function closeDialog(success)
 {
-  ext.backgroundPage.sendMessage({
+  chrome.runtime.sendMessage({
     type: "forward",
     targetPageId,
     payload:
     {
       type: "composer.content.finished",
       remove: (typeof success == "boolean" ? success : false)
     }
   });
   window.close();
 }
@@ skipping 23 matching lines @@
         break;
       case "composer.dialog.close":
         window.close();
         break;
     }
   });
 
   window.removeEventListener("load", init);
 }
 window.addEventListener("load", init, false);