Issue 3200 - Delay initialization for prerendered documents

include.preload.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
- * Copyright (C) 2006-2017 eyeo GmbH
+ * 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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
@@ skipping 558 matching lines @@
     });
 
     this.propertyFilters.load(function()
     {
       propertyFiltersLoaded = true;
       checkLoaded();
     });
   }
 };
 
-if (document instanceof HTMLDocument)
-{
-  checkSitekey();
-  wrapWebSocket();
-
-  var elemhide = new ElemHide();
-
+function whenDocumentVisible(callback)
+{
   if (document.visibilityState == "prerender")
   {
     // For prerendered documents, wait until the document is made visible. We
     // do not have access to the page property of the SafariBrowserTab object
     // associated with this document until it is visible. Without the page
     // property, we cannot get a response from the background page.
-    document.addEventListener("visibilitychange", function onVisibilitychange()
+    let onVisibilitychange = function()
     {
       document.removeEventListener("visibilitychange", onVisibilitychange);
-
-      elemhide.apply();
-    });
+      callback();
+    };
+
+    document.addEventListener("visibilitychange", onVisibilitychange);
   }
   else
   {
-    elemhide.apply();
-  }
+    callback();
+  }
+}
+
+if (document instanceof HTMLDocument)
+{
+  checkSitekey();
+  wrapWebSocket();
+
+  var elemhide = new ElemHide();
+
+  whenDocumentVisible(elemhide.apply.bind(elemhide));
 
   document.addEventListener("error", function(event)
   {
     checkCollapse(event.target);
   }, true);
 
   document.addEventListener("load", function(event)
   {
     var element = event.target;
     if (/^i?frame$/.test(element.localName))
       checkCollapse(element);
   }, true);
 }