Introduce PageCyclerStory and let the stories wait for onload+TTI

tools/perf/page_sets/intl_ja_zh.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 page_cycler_story
 from telemetry.page import cache_temperature as cache_temperature_module
-from telemetry.page import page as page_module
 from telemetry.page import shared_page_state
 from telemetry import story
 
 
-class IntlJaZhPage(page_module.Page):
+class IntlJaZhPage(page_cycler_story.PageCyclerStory):
 
   def __init__(self, url, page_set, cache_temperature=None):
     super(IntlJaZhPage, self).__init__(
         url=url, page_set=page_set,
         shared_page_state_class=shared_page_state.SharedDesktopPageState,
         cache_temperature=cache_temperature)
 
 
 class IntlJaZhPageSet(story.StorySet):
 
@@ skipping 33 matching lines @@
       # Why: #5 Chinese site
       # pylint: disable=line-too-long
       'http://www.google.com.hk/#q=%E9%82%84%E6%8F%90%E4%BE%9B&fp=c44d333e710cb480',
       'http://udn.com/NEWS/mainpage.shtml',
       'http://ruten.com.tw/'
     ]
 
     for url in urls_list:
       for temp in cache_temperatures:
         self.AddStory(IntlJaZhPage(url, self, cache_temperature=temp))