[system-health] Unify SH stories interface

tools/perf/page_sets/system_health/browsing_stories.py

 # Copyright 2016 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.
 
-import sys
-
 from page_sets.system_health import platforms
 from page_sets.system_health import system_health_story
 
-from telemetry import story
-
 
 class _BrowsingStory(system_health_story.SystemHealthStory):
   """Abstract base class for browsing stories.
 
   A browsing story visits items on the main page. Subclasses provide
   CSS selector to identify the items and implement interaction using
   the helper methods of this class.
   """
 
   IS_SINGLE_PAGE_APP = False
   ITEM_SELECTOR = NotImplemented
   ITEMS_TO_VISIT = 4
-
-  def __init__(self, story_set):
-    super(_BrowsingStory, self).__init__(
-        story_set, take_memory_measurement=False)
+  ABSTRACT_STORY = True
 
   def _WaitForNavigation(self, action_runner):
     if not self.IS_SINGLE_PAGE_APP:
       action_runner.WaitForNavigate()
 
   def _NavigateToItem(self, action_runner, index):
     item_selector = 'document.querySelectorAll("%s")[%d]' % (
         self.ITEM_SELECTOR, index)
     self._ClickLink(action_runner, item_selector)
 
@@ skipping 15 matching lines @@
   2. Open and scroll the first news item.
   3. Go back to the main page and scroll it.
   4. Open and scroll the second news item.
   5. Go back to the main page and scroll it.
   6. etc.
   """
 
   ITEM_READ_TIME_IN_SECONDS = 3
   ITEM_SCROLL_REPEAT = 2
   MAIN_PAGE_SCROLL_REPEAT = 0
+  ABSTRACT_STORY = True
 
   def _DidLoadDocument(self, action_runner):
     for i in xrange(self.ITEMS_TO_VISIT):
       self._NavigateToItem(action_runner, i)
       self._ReadNewsItem(action_runner)
       self._NavigateBack(action_runner)
       self._ScrollMainPage(action_runner)
 
   def _ReadNewsItem(self, action_runner):
     action_runner.tab.WaitForDocumentReadyStateToBeComplete()
@@ skipping 103 matching lines @@
   NAME = 'browse:news:washingtonpost'
   URL = 'https://www.washingtonpost.com/pwa'
   IS_SINGLE_PAGE_APP = True
   ITEM_SELECTOR = '.hed > a'
   SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
 
   def _DidLoadDocument(self, action_runner):
     # Close the popup window.
     action_runner.ClickElement(selector='.close')
     super(WashingtonPostMobileStory, self)._DidLoadDocument(action_runner)
-
-
-##############################################################################
-# Browsing story sets.
-##############################################################################
-
-
-def _IterAllNewsBrowsingStoryClasses():
-  return system_health_story.IterAllStoryClasses(
-      sys.modules[__name__], _NewsBrowsingStory)
-
-
-class _BrowsingSystemHealthStorySet(story.StorySet):
-  PLATFORM = NotImplemented
-
-  def __init__(self):
-    super(_BrowsingSystemHealthStorySet, self).__init__(
-        archive_data_file=('../data/browsing_%s.json' % self.PLATFORM),
-        cloud_storage_bucket=story.PARTNER_BUCKET)
-    for story_class in _IterAllNewsBrowsingStoryClasses():
-      if self.PLATFORM not in story_class.SUPPORTED_PLATFORMS:
-        continue
-      self.AddStory(story_class(self))
-
-
-class DesktopBrowsingSystemHealthStorySet(_BrowsingSystemHealthStorySet):
-  PLATFORM = platforms.DESKTOP
-
-
-class MobileBrowsingSystemHealthStorySet(_BrowsingSystemHealthStorySet):
-  PLATFORM = platforms.MOBILE