Modify list_system_health_stories to generate_system_health_csv

tools/perf/page_sets/system_health/browsing_stories.py

 # encoding: utf-8
 # 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.
 
 from page_sets.system_health import platforms
 from page_sets.system_health import story_tags
 from page_sets.system_health import system_health_story
 
 from page_sets.login_helpers import pinterest_login
@@ skipping 32 matching lines @@
 
   def _ClickLink(self, action_runner, element_function):
     action_runner.WaitForElement(element_function=element_function)
     action_runner.ClickElement(element_function=element_function)
     self._WaitForNavigation(action_runner)
 
   def _NavigateBack(self, action_runner):
     action_runner.NavigateBack()
     self._WaitForNavigation(action_runner)
 
+  @classmethod
+  def GenerateStoryDescription(cls):
+    return 'Load %s and navigate to some items/articles.' % cls.URL
+
 
 class _ArticleBrowsingStory(_BrowsingStory):
   """Abstract base class for user stories browsing news / shopping articles.
 
   An article browsing story imitates browsing a articles:
   1. Load the main page.
   2. Open and scroll the first article.
   3. Go back to the main page and scroll it.
   4. Open and scroll the second article.
   5. Go back to the main page and scroll it.
@@ skipping 326 matching lines @@
 @decorators.Disabled('win', 'mac')
 class ImgurDesktopStory(_MediaBrowsingStory):
   NAME = 'browse:media:imgur'
   URL = 'http://imgur.com/gallery/5UlBN'
   ITEM_SELECTOR = '.navNext'
   SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
   IS_SINGLE_PAGE_APP = True
 
 
 class YouTubeMobileStory(_MediaBrowsingStory):
+  """Load a typical YouTube video then navigate to a next few videos. Stop and
+  watch each video for few seconds.
+  """
   NAME = 'browse:media:youtube'
   URL = 'https://m.youtube.com/watch?v=QGfhS1hfTWw&autoplay=false'
   ITEM_SELECTOR = '._mhgb > a'
   SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
   IS_SINGLE_PAGE_APP = True
   ITEM_SELECTOR_INDEX = 3
   TAGS = [story_tags.JAVASCRIPT_HEAVY]
   TAGS = [story_tags.EMERGING_MARKET]
 
 
 class YouTubeDesktopStory(_MediaBrowsingStory):
+  """Load a typical YouTube video then navigate to a next few videos. Stop and
+  watch each video for a few seconds.
+  """
   NAME = 'browse:media:youtube'
   URL = 'https://www.youtube.com/watch?v=QGfhS1hfTWw&autoplay=false'
   ITEM_SELECTOR = '.yt-uix-simple-thumb-related'
   SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
   IS_SINGLE_PAGE_APP = True
   # A longer view time allows videos to load and play.
   ITEM_VIEW_TIME_IN_SECONDS = 5
   ITEMS_TO_VISIT = 8
   ITEM_SELECTOR_INDEX = 3
   PLATFORM_SPECIFIC = True
   TAGS = [story_tags.JAVASCRIPT_HEAVY]
 
 
 class FacebookPhotosMobileStory(_MediaBrowsingStory):
+  """Load a photo page from Rihanna's facebook page then navigate a few next
+  photos.
+  """
   NAME = 'browse:media:facebook_photos'
   URL = (
       'https://m.facebook.com/rihanna/photos/a.207477806675.138795.10092511675/10153911739606676/?type=3&source=54&ref=page_internal')
   ITEM_SELECTOR = '._57-r.touchable'
   SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
   IS_SINGLE_PAGE_APP = True
   ITEM_SELECTOR_INDEX = 0
   TAGS = [story_tags.EMERGING_MARKET]
 
 
 class FacebookPhotosDesktopStory(_MediaBrowsingStory):
+  """Load a photo page from Rihanna's facebook page then navigate a few next
+  photos.
+  """
   NAME = 'browse:media:facebook_photos'
   URL = (
       'https://www.facebook.com/rihanna/photos/a.207477806675.138795.10092511675/10153911739606676/?type=3&theater')
   ITEM_SELECTOR = '.snowliftPager.next'
   # Recording currently does not work. The page gets stuck in the
   # theater viewer.
   SUPPORTED_PLATFORMS = platforms.NO_PLATFORMS
   IS_SINGLE_PAGE_APP = True
 
 
@@ skipping 318 matching lines @@
     # Reduce the speed (the current wpr is recorded with speed set to 50)  when
     # recording the wpr. If we scroll too fast, the data will not be recorded
     # well. After recording reset it back to the original value to have a more
     # realistic scroll.
     action_runner.RepeatableBrowserDrivenScroll(
         x_scroll_distance_ratio = 0.0, y_scroll_distance_ratio = 1,
         repeat_count=3, speed=400, timeout=120)
     action_runner.RepeatableBrowserDrivenScroll(
         x_scroll_distance_ratio = 1, y_scroll_distance_ratio = 0,
         repeat_count=3, speed=500, timeout=120)