Issue 6539, 6782 - Implement support for snippets

include.preload.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 542 matching lines @@
       browser.runtime.sendMessage({
         type: "hitLogger.traceElemHide",
         selectors: [],
         filters
       });
     }
   },
 
   apply(filterTypes)
   {
-    let message = {type: "content.applyFilters"};
-
-    if (filterTypes)
-      message.filterTypes = filterTypes;
-
-    browser.runtime.sendMessage(message, response =>
+    browser.runtime.sendMessage({
+      type: "content.applyFilters",
+      filterTypes
+    },
+    response =>
     {
       if (this.tracer)
         this.tracer.disconnect();
       this.tracer = null;
 
       if (response.trace)
         this.tracer = new ElementHidingTracer();
 
       this.inline = response.inline;
       this.inlineEmulated = !!response.inlineEmulated;
@@ skipping 31 matching lines @@
     let element = event.target;
     if (/^i?frame$/.test(element.localName))
       checkCollapse(element);
   }, true);
 }
 
 window.checkCollapse = checkCollapse;
 window.contentFiltering = contentFiltering;
 window.typeMap = typeMap;
 window.getURLsFromElement = getURLsFromElement;