Issue 4449 - Use 'websocket' type for WebSocket connections

lib/contentPolicy.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2016 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 42 matching lines @@
     yield ["IMAGESET", "IMAGE"];
 
     // Treat fetch() the same as XMLHttpRequest,
     // it's essentially the same - merely a more modern API.
     yield ["FETCH", "XMLHTTPREQUEST"];
 
     // Everything else is mapped to itself
     for (let contentType of ["OTHER", "SCRIPT", "IMAGE", "STYLESHEET", "OBJECT",
                              "SUBDOCUMENT", "DOCUMENT", "XMLHTTPREQUEST",
                              "OBJECT_SUBREQUEST", "FONT", "MEDIA", "PING",
-                             "ELEMHIDE", "POPUP", "GENERICHIDE", "GENERICBLOCK"])
+                             "WEBSOCKET", "ELEMHIDE", "POPUP", "GENERICHIDE",
+                             "GENERICBLOCK"])
       yield [contentType, contentType];
   }()),
 
   /**
    * Set of content types that aren't associated with a visual document area
    * @type Set.<string>
    */
   nonVisualTypes: new Set([
     "SCRIPT", "STYLESHEET", "XMLHTTPREQUEST", "OBJECT_SUBREQUEST", "FONT",
-    "PING", "ELEMHIDE", "POPUP", "GENERICHIDE", "GENERICBLOCK"
+    "PING", "WEBSOCKET", "ELEMHIDE", "POPUP", "GENERICHIDE", "GENERICBLOCK"
   ]),
 
   /**
    * Map containing all schemes that should be ignored by content policy.
    * @type Set.<string>
    */
   whitelistSchemes: new Set(),
 
   /**
    * Called on module startup, initializes various exported properties.
@@ skipping 339 matching lines @@
   {
     // EffectiveTLDService throws on IP addresses, just compare the host name
     let host = "";
     try
     {
       host = uri.host;
     } catch (e) {}
     return host != docDomain;
   }
 }