Issue 2021 - Replaced FileSystem API with chrome.storage.local

chrome/ext/background.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 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 527 matching lines @@
         }
         else if (key == "currentVersion")
         {
           items[key] = value;
         }
       }
 
       chrome.storage.local.set(items, function() {
         localStorage.clear();
       });
+    },
+
+    // Migrate FileSystem API to chrome.storage.local. For simplicity
+    // only patterns.ini is considered. Backups are left behind.
+    migrateFiles: function(callback)
+    {
+      if ("webkitRequestFileSystem" in window)
+      {
+        webkitRequestFileSystem(PERSISTENT, 0, function(fs)
+        {
+          fs.root.getFile("patterns.ini", {}, function(entry)
+          {
+            entry.getMetadata(function(metadata)
+            {
+              entry.file(function(file)
+              {
+                var reader = new FileReader();
+                reader.onloadend = function()
+                {
+                  if (!reader.error)
+                  {
+                    chrome.storage.local.set(
+                      {
+                        "file:patterns.ini": {
+                          content: reader.result.split(/[\r\n]+/),
+                          lastModified: metadata.modificationTime.getTime()
+                        }
+                      },
+                      function()
+                      {
+                        fs.root.removeRecursively(callback, callback);
+                      }
+                    );
+                  }
+                  else
+                  {
+                    callback();
+                  }
+                };
+                reader.readAsText(file);
+              }, callback);
+            }, callback);
+          }, callback);
+        }, callback);
+      }
+      else
+      {
+        callback();
+      }
     }
   };
 
   /* Options */
 
   ext.showOptions = function(callback)
   {
     chrome.windows.getLastFocused(function(win)
     {
       var optionsUrl = chrome.extension.getURL("options.html");
@@ skipping 18 matching lines @@
             callback(new Page(tab));
         }
         else
         {
           ext.pages.open(optionsUrl, callback);
         }
       });
     });
   };
 })();