Update perf page_set to use story_set

tools/perf/page_sets/top_25_repaint.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 page_sets import repaint_helpers
+from page_sets import top_pages
+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
-
-from page_sets import top_pages
-from page_sets import repaint_helpers
 
 
 class TopRepaintPage(page_module.Page):
 
   def __init__(self, url, page_set, mode, width, height, name='',
                credentials=None):
     super(TopRepaintPage, self).__init__(
         url=url, page_set=page_set, name=name,
         credentials_path='data/credentials.json',
         shared_page_state_class=shared_page_state.SharedDesktopPageState)
@@ skipping 11 matching lines @@
 def _CreatePageClassWithRepaintInteractions(page_cls, mode, width, height):
   class DerivedRepaintPage(page_cls):  # pylint: disable=W0232
 
     def RunPageInteractions(self, action_runner):
       repaint_helpers.Repaint(
           action_runner, mode=mode, width=width, height=height)
 
   return DerivedRepaintPage
 
 
-class Top25RepaintPageSet(page_set_module.PageSet):
+class Top25RepaintPageSet(story.StorySet):
 
   """ Pages hand-picked for 2012 CrOS scrolling tuning efforts. """
 
   def __init__(self, mode='viewport', width=None, height=None):
     super(Top25RepaintPageSet, self).__init__(
         archive_data_file='data/top_25_repaint.json',
-        bucket=page_set_module.PARTNER_BUCKET)
+        cloud_storage_bucket=story.PARTNER_BUCKET)
 
     top_page_classes = [
         top_pages.GoogleWebSearchPage,
         top_pages.GoogleImageSearchPage,
         top_pages.GmailPage,
         top_pages.GoogleCalendarPage,
         top_pages.GoogleDocPage,
         top_pages.GooglePlusPage,
         top_pages.YoutubePage,
         top_pages.BlogspotPage,
@@ skipping 29 matching lines @@
         'http://answers.yahoo.com',
         # Why: #1 Alexa sports
         'http://sports.yahoo.com/',
         # Why: top tech blog
         'http://techcrunch.com'
     ]
 
     for url in other_urls:
       self.AddUserStory(
           TopRepaintPage(url, self, mode=mode, height=height, width=width))