Issue 5094 - Implement support for :has() in chrome extension

include.preload.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2017 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 430 matching lines @@
 
     if (this.tracer)
       this.tracer.addSelectors(selectors, filters);
   },
 
   hideElements(elements, filters)
   {
     for (let element of elements)
       hideElement(element);
 
     if (this.tracer)

[kzar, 2017/06/14 10:20:30]

Nit: Since this if clause spans multiple lines please add the braces. Also did
this pass ESLint?

[hub, 2017/06/14 15:49:27]

it did pass ESLint. Adding the braces.

+    {
       ext.backgroundPage.sendMessage({
         type: "devtools.traceElemHide",
         selectors: [],
         filters
       });
+    }
   },
 
   apply()
   {
     ext.backgroundPage.sendMessage({type: "get-selectors"}, response =>
     {
       if (this.tracer)
         this.tracer.disconnect();
       this.tracer = null;
 
@@ skipping 22 matching lines @@
     checkCollapse(event.target);
   }, true);
 
   document.addEventListener("load", event =>
   {
     let element = event.target;
     if (/^i?frame$/.test(element.localName))
       checkCollapse(element);
   }, true);
 }