Update perf page_set to use story_set

tools/perf/page_sets/intl_ja_zh.py

Index: tools/perf/page_sets/intl_ja_zh.py
diff --git a/tools/perf/page_sets/intl_ja_zh.py b/tools/perf/page_sets/intl_ja_zh.py
index fcc8cfba301cbf686d30673584698a028e3486a5..fdecfed097d533d49295cc865cf5ca2eec181d36 100644
--- a/tools/perf/page_sets/intl_ja_zh.py
+++ b/tools/perf/page_sets/intl_ja_zh.py
@@ -1,9 +1,9 @@
 # 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.page import shared_page_state
+from telemetry import story
 from telemetry.page import page as page_module
-from telemetry.page import page_set as page_set_module
+from telemetry.page import shared_page_state
 
 
 class IntlJaZhPage(page_module.Page):
@@ -15,14 +15,14 @@ class IntlJaZhPage(page_module.Page):
     self.archive_data_file = 'data/intl_ja_zh.json'
 
 
-class IntlJaZhPageSet(page_set_module.PageSet):
+class IntlJaZhPageSet(story.StorySet):
 
   """ Popular pages in Japanese and Chinese. """
 
   def __init__(self):
     super(IntlJaZhPageSet, self).__init__(
       archive_data_file='data/intl_ja_zh.json',
-      bucket=page_set_module.PARTNER_BUCKET)
+      cloud_storage_bucket=story.PARTNER_BUCKET)
 
     urls_list = [
       # Why: #5 Japanese site