Issue 5220 - Update the IO API

lib/compat.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 67 matching lines @@
 const Cr = Components.results;
 const Cu = Components.utils;
 
 Cu.import.resources = new Map();
 
 Cu.import.resources.set("XPCOMUtils", {
   generateQI() {}
 });
 
 //
-// Fake nsIFile implementation for our I/O
-//
-
-function FakeFile(path)
-{
-  this.path = path;
-}
-FakeFile.prototype =
-{
-  get leafName()
-  {
-    return this.path;
-  },
-  set leafName(value)
-  {
-    this.path = value;
-  },
-  append(path)
-  {
-    this.path += path;
-  },
-  clone()
-  {
-    return new FakeFile(this.path);
-  },
-  get parent()
-  {
-    return {create() {}};
-  },
-  normalize() {}
-};
-
-//
 // Services.jsm module emulation
 //
 
 Cu.import.resources.set("Services", {
   obs: {
     addObserver() {},
     removeObserver() {}
   },
   vc: {
     compare(v1, v2)
@@ skipping 111 matching lines @@
   status: -1,
   notificationCallbacks: {},
   loadFlags: 0,
   INHIBIT_CACHING: 0,
   VALIDATE_ALWAYS: 0,
   QueryInterface()
   {
     return this;
   }
 };