Explicitly setting story names for all smoothness benchmarks

tools/perf/page_sets/key_silk_cases.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.page import page as page_module
 from telemetry.page import shared_page_state
 from telemetry import story
 
 
 class KeySilkCasesPage(page_module.Page):
 
   def __init__(self, url, page_set, run_no_page_interactions):
     """ Base class for all key silk cases pages.
 
     Args:
       run_no_page_interactions: whether the page will run any interactions after
         navigate steps.
     """
     super(KeySilkCasesPage, self).__init__(
         url=url, page_set=page_set, credentials_path = 'data/credentials.json',
         shared_page_state_class=shared_page_state.SharedMobilePageState)
+
     self.archive_data_file = 'data/key_silk_cases.json'
     self._run_no_page_interactions = run_no_page_interactions
 
   def RunNavigateSteps(self, action_runner):
     super(KeySilkCasesPage, self).RunNavigateSteps(action_runner)
     action_runner.Wait(2)
 
   def RunPageInteractions(self, action_runner):
     # If a key silk case page wants to customize it actions, it should
     # overrides the PerformPageInteractions method instead of this method.
@@ skipping 728 matching lines @@
     self.AddStory(SilkFinance(self, run_no_page_interactions))
     # Flaky interaction steps on Android; crbug.com/507865
     # self.AddStory(PolymerTopeka(self, run_no_page_interactions))
     self.AddStory(Masonry(self, run_no_page_interactions))
 
     for page in self:
       assert (page.__class__.RunPageInteractions ==
               KeySilkCasesPage.RunPageInteractions), (
               'Pages in this page set must not override KeySilkCasesPage\' '
               'RunPageInteractions method.')