Issue 4864 - Start using ESLint for adblockpluschrome

lib/whitelisting.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
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  * GNU General Public License for more details.
  *
  * You should have received a copy of the GNU General Public License
  * along with Adblock Plus.  If not, see <http://www.gnu.org/licenses/>.
  */
 
 /** @module whitelisting */
 
 "use strict";
 
 const {defaultMatcher} = require("matcher");
 const {RegExpFilter} = require("filterClasses");
-const {DownloadableSubscription} = require("subscriptionClasses");
 const {FilterNotifier} = require("filterNotifier");
 const {stringifyURL, getDecodedHostname,
        extractHostFromFrame, isThirdParty} = require("url");
 const {port} = require("messaging");
 const devtools = require("devtools");
 const {verifySignature} = require("rsa");
 
 let sitekeys = new ext.PageMap();
 
 function match(page, url, typeMask, docDomain, sitekey)
 {
   let thirdParty = !!docDomain && isThirdParty(url, docDomain);
   let urlString = stringifyURL(url);
 
   if (!docDomain)
     docDomain = getDecodedHostname(url);
 
   let filter = defaultMatcher.whitelist.matchesAny(
     urlString, typeMask, docDomain, thirdParty, sitekey
   );
 
   if (filter && devtools)
+  {
     devtools.logWhitelistedDocument(
       page, urlString, typeMask, docDomain, filter
     );
+  }
 
   return filter;
 }
 
 let checkWhitelisted =
 /**
  * Gets the active whitelisting filter for the document associated
  * with the given page/frame, or null if it's not whitelisted.
  *
  * @param {Page}   page
  * @param {Frame}  [frame]
  * @param {number} [typeMask=RegExpFilter.typeMap.DOCUMENT]
  * @return {?WhitelistFilter}
  */
 exports.checkWhitelisted = (page, frame, typeMask) =>
 {
   if (typeof typeMask == "undefined")
     typeMask = RegExpFilter.typeMap.DOCUMENT;
 
   if (frame)
   {
     let filter = null;
 
     while (frame && !filter)
     {
-      let parent = frame.parent;
+      let {parent} = frame;
       let docDomain = extractHostFromFrame(parent);
       let sitekey = getKey(page, frame);
 
       filter = match(page, frame.url, typeMask, docDomain, sitekey);
       frame = parent;
     }
 
     return filter;
   }
 
@@ skipping 97 matching lines @@
       if (key)
       {
         recordKey(key, page, url);
         break;
       }
     }
   }
 }
 
 if (typeof chrome == "object")
+{
   chrome.webRequest.onHeadersReceived.addListener(
     onHeadersReceived,
     {
       urls: ["http://*/*", "https://*/*"],
       types: ["main_frame", "sub_frame"]
     },
     ["responseHeaders"]
   );
+}