Update perf page_set to use story_set

tools/perf/page_sets/intl_ar_fa_he.py

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
+from telemetry import story
+from telemetry.page import page as page_module
 from telemetry.page import shared_page_state
-from telemetry.page import page as page_module
-from telemetry.page import page_set as page_set_module
 
 
 class IntlArFaHePage(page_module.Page):
 
   def __init__(self, url, page_set):
     super(IntlArFaHePage, self).__init__(
         url=url, page_set=page_set,
         shared_page_state_class=shared_page_state.SharedDesktopPageState)
     self.archive_data_file = 'data/intl_ar_fa_he.json'
 
 
-class IntlArFaHePageSet(page_set_module.PageSet):
+class IntlArFaHePageSet(story.StorySet):
 
   """ Popular pages in right-to-left languages Arabic, Farsi and Hebrew. """
 
   def __init__(self):
     super(IntlArFaHePageSet, self).__init__(
       archive_data_file='data/intl_ar_fa_he.json',
-      bucket=page_set_module.PARTNER_BUCKET)
+      cloud_storage_bucket=story.PARTNER_BUCKET)
 
     urls_list = [
       'http://msn.co.il/',
       'http://ynet.co.il/',
       'http://www.islamweb.net/',
       'http://farsnews.com/',
       'http://www.masrawy.com/',
       'http://www.startimes.com/f.aspx',
       'http://www.aljayyash.net/',
       'http://www.google.com.sa/'
     ]
 
     for url in urls_list:
       self.AddUserStory(IntlArFaHePage(url, self))