Issue 3716 - Split up files stored in storage.local

lib/io.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 77 matching lines @@
     }
 
     loadFile(file).then(onLoaded, callback);
   },
 
   writeToFile: function(file, data, callback)
   {
     let items = {};
     let entry = items[fileToKey(file)] = {lastModified: Date.now()};
 
     if (typeof browser == "object")

[Oleksandr, 2016/04/01 12:45:10]

I was using this to test in Chrome. Just noticed that it wasn't reverted before
upload.

     {
       loadFile(file).catch(() => null)
                     .then(oldEntry =>
       {
         let quota = 1024 * 1024 / 2 - 1000;
         let chunks = [];
         let chunk = [];
         let chunkSize = 0;
 
         for (let line of data)
@@ skipping 31 matching lines @@
   {
     function onLoaded(entry)
     {
       callback(null, {
         exists: true,
         lastModified: entry.lastModified
       });
     }
 
     loadFile(file).then(onLoaded, callback);
-  },

[Sebastian Noack, 2016/04/01 13:01:05]

Nit: You added a redundant comma here. There should be no comma after the last
property in object literals.

+  }
 };