Issue 6986 - Don't use chromium remote interface on Windows

test/runners/chromium_remote_process.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 41 matching lines @@
     fs.rmdirSync(dirPath);
   }
   catch (error)
   {
     console.error(error);
   }
 }
 
 function startChromium(chromiumPath)
 {
-  fs.chmodSync(chromiumPath, fs.constants.S_IRWXU);
+  // fs.constants.S_IRWXU is undefined on Windows, so we use a numerical const.
+  fs.chmodSync(chromiumPath, 0o700);
 
   let dataDir = fs.mkdtempSync(path.join(os.tmpdir(), "chromium-data"));
   let child = null;
   return {
     kill: () => child && child.kill(),
     done: new Promise((resolve, reject) =>
     {
       child = childProcess.execFile(chromiumPath, [
         "--headless", "--single-process", "--disable-gpu", "--no-sandbox",
         "--allow-file-access-from-files", "--remote-debugging-port=9222",
@@ skipping 135 matching lines @@
     {
       child.kill();
       return result;
     }).catch(error =>
     {
       child.kill();
       throw error;
     });
   });
 };