Introduce PageCyclerStory and let the stories wait for onload+TTI

tools/perf/page_sets/intl_es_fr_pt-BR.py

Index: tools/perf/page_sets/intl_es_fr_pt-BR.py
diff --git a/tools/perf/page_sets/intl_es_fr_pt-BR.py b/tools/perf/page_sets/intl_es_fr_pt-BR.py
index 8f8a76b6f3c14124b755986d8a49f8de0d3dde56..b76b21e0c26cf70e9a7db957f5cf181d65515f49 100644
--- a/tools/perf/page_sets/intl_es_fr_pt-BR.py
+++ b/tools/perf/page_sets/intl_es_fr_pt-BR.py
@@ -1,13 +1,13 @@
 # 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

[petrcermak, 2016/08/15 10:49:29]

ditto

[kouhei (in TOK), 2016/08/22 06:09:21]

Done.

+from telemetry import 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 IntlEsFrPtBrPage(page_module.Page):
+class IntlEsFrPtBrPage(page_cycler_story.PageCyclerStory):
 
   def __init__(self, url, page_set, cache_temperature=None):
     super(IntlEsFrPtBrPage, self).__init__(