Issue 5083 - Merges chrome subdirectory to top level directory

ext/popup.js

+"use strict";
+
+(function()
+{
+  const backgroundPage = chrome.extension.getBackgroundPage();
+  window.ext = Object.create(backgroundPage.ext);
+
+  window.ext.closePopup = () =>
+  {
+    window.close();
+  };
+
+  // We have to override ext.backgroundPage, because in order
+  // to send messages the local "chrome" namespace must be used.
+  window.ext.backgroundPage = {
+    sendMessage: chrome.runtime.sendMessage,
+
+    getWindow()
+    {
+      return backgroundPage;
+    }
+  };
+}());