Issue 1488 - Add pre-configurable preference to suppress first run page

safari/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 685 matching lines @@
     {
       delete safari.extension.settings[key];
 
       if (callback)
         setTimeout(callback, 0);
     },
     onChanged: new ext._EventTarget(),
 
     // Preferences were previously encoded as JSON for compatibility
     // with localStorage, which has been used on Chrome.
-    migratePrefs: function(mapFunc)
+    migratePrefs: function(hooks)
     {
       var settings = safari.extension.settings;
 
       for (var key in settings)
       {
-        var item = mapFunc(key, settings[key]);
+        var item = hooks.map(key, settings[key]);
 
         // Only touch settings if the key changed. Otherwise we would keep
         // migrating "currentVersion" over and over again on every initilization.
         if (item && item.key != key)
         {
           delete settings[key];
           settings[item.key] = item.value;
         }
       }
+
+      hooks.done();
     },
 
     // While moving away from the FileSystem API on Chrome the data structure
     // for files on Safari changed as well, in order to keep thing consistent.
     migrateFiles: function(callback)
     {
       var settings = safari.extension.settings;
 
       for (var key in settings)
       {
@@ skipping 51 matching lines @@
         tab.activate();
         if (callback)
           callback(page);
         return;
       }
     }
 
     ext.pages.open(optionsUrl, callback);
   };
 })();