Add benchmark that imitates news reading.

tools/perf/page_sets/system_health/single_page_stories.py

Index: tools/perf/page_sets/system_health/single_page_stories.py
diff --git a/tools/perf/page_sets/system_health/single_page_stories.py b/tools/perf/page_sets/system_health/single_page_stories.py
index efd8e09f518ee37179a8bda1a48e65cefaa26db3..f09fa0fa25ec6399ad710d4a88d25b87a600556c 100644
--- a/tools/perf/page_sets/system_health/single_page_stories.py
+++ b/tools/perf/page_sets/system_health/single_page_stories.py
@@ -2,81 +2,23 @@
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
-import logging
 import sys
 
+from page_sets.system_health import platforms
+from page_sets.system_health import system_health_story
+
 from page_sets.login_helpers import dropbox_login
 from page_sets.login_helpers import google_login
 
-from telemetry.core import discover
-from telemetry.page import page
-
-
-_ALL_PLATFORMS = frozenset({'desktop', 'mobile'})
-_DESKTOP_ONLY = frozenset({'desktop'})
-_MOBILE_ONLY = frozenset({'mobile'})
-_NO_PLATFORMS = frozenset()
-
 
-_DUMP_WAIT_TIME = 3
-
-
-class _SinglePageStory(page.Page):
+class _SinglePageStory(system_health_story.SystemHealthStory):
   """Abstract base class for single-page System Health user stories."""
-
-  # The full name of a single page story has the form CASE:GROUP:PAGE (e.g.
-  # 'load:search:google').
-  NAME = NotImplemented
-  URL = NotImplemented
-  SUPPORTED_PLATFORMS = _ALL_PLATFORMS
-
-  def __init__(self, story_set, take_memory_measurement):
-    case, group, _ = self.NAME.split(':')
-    super(_SinglePageStory, self).__init__(
-        page_set=story_set, name=self.NAME, url=self.URL,
-        credentials_path='../data/credentials.json',
-        grouping_keys={'case': case, 'group': group})
-    self._take_memory_measurement = take_memory_measurement
-
-  def _Measure(self, action_runner):
-    if not self._take_memory_measurement:
-      return
-    # TODO(petrcermak): This method is essentially the same as
-    # MemoryHealthPage._TakeMemoryMeasurement() in memory_health_story.py.
-    # Consider sharing the common code.
-    action_runner.Wait(_DUMP_WAIT_TIME)
-    action_runner.ForceGarbageCollection()
-    action_runner.Wait(_DUMP_WAIT_TIME)
-    tracing_controller = action_runner.tab.browser.platform.tracing_controller
-    if not tracing_controller.is_tracing_running:
-      return  # Tracing is not running, e.g., when recording a WPR archive.
-    if not action_runner.tab.browser.DumpMemory():
-      logging.error('Unable to get a memory dump for %s.', self.name)
-
-  def _Login(self, action_runner):
-    pass
-
-  def _DidLoadDocument(self, action_runner):
-    pass
-
-  def RunNavigateSteps(self, action_runner):
-    self._Login(action_runner)
-    super(_SinglePageStory, self).RunNavigateSteps(action_runner)
-
-  def RunPageInteractions(self, action_runner):
-    action_runner.tab.WaitForDocumentReadyStateToBeComplete()
-    self._DidLoadDocument(action_runner)
-    self._Measure(action_runner)
+  pass
 
 
 def IterAllStoryClasses():
-  # Sort the classes by their names so that their order is stable and
-  # deterministic.
-  for unused_cls_name, cls in sorted(discover.DiscoverClassesInModule(
-      module=sys.modules[__name__],
-      base_class=_SinglePageStory,
-      index_by_class_name=True).iteritems()):
-    yield cls
+  return system_health_story.IterAllStoryClasses(
+      sys.modules[__name__], _SinglePageStory)
 
 
 ################################################################################
@@ -107,14 +49,14 @@ class LoadAmazonStory(_SinglePageStory):
 class LoadTaobaoDesktopStory(_SinglePageStory):
   NAME = 'load:search:taobao'
   URL = 'https://world.taobao.com/'
-  SUPPORTED_PLATFORMS = _DESKTOP_ONLY
+  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
 
 
 class LoadTaobaoMobileStory(_SinglePageStory):
   NAME = 'load:search:taobao'
   # "ali_trackid" in the URL suppresses "Download app" interstitial.
   URL = 'http://m.intl.taobao.com/?ali_trackid'
-  SUPPORTED_PLATFORMS = _MOBILE_ONLY
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
 
 
 class LoadYandexStory(_SinglePageStory):
@@ -151,7 +93,7 @@ class LoadVkStory(_SinglePageStory):
   # set by https://vk.com immediately expires, so the page keeps refreshing
   # indefinitely on mobile
   # (see https://github.com/chromium/web-page-replay/issues/71).
-  SUPPORTED_PLATFORMS = _DESKTOP_ONLY
+  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
 
 
 class LoadInstagramStory(_SinglePageStory):
@@ -192,14 +134,14 @@ class LoadRedditDesktopStory(_SinglePageStory):
   NAME = 'load:news:reddit'
   URL = (
       'https://www.reddit.com/r/AskReddit/comments/4hi90e/whats_your_best_wedding_horror_story/')
-  SUPPORTED_PLATFORMS = _DESKTOP_ONLY
+  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
 
 
 class LoadRedditMobileStory(_SinglePageStory):
   NAME = 'load:news:reddit'
   URL = (
       'https://m.reddit.com/r/AskReddit/comments/4hi90e/whats_your_best_wedding_horror_story/')
-  SUPPORTED_PLATFORMS = _MOBILE_ONLY
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
 
 
 class LoadQqMobileStory(_SinglePageStory):
@@ -216,7 +158,7 @@ class LoadSohuStory(_SinglePageStory):
   # The desktop page (http://news.sohu.com/20160503/n447433356.shtml) almost
   # always fails to completely load due to
   # https://github.com/chromium/web-page-replay/issues/74.
-  SUPPORTED_PLATFORMS = _MOBILE_ONLY
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
 
 
 class LoadWikipediaStory(_SinglePageStory):
@@ -286,7 +228,7 @@ class LoadDocsStory(_SinglePageStory):
 class _LoadGmailBaseStory(_SinglePageStory):
   NAME = 'load:tools:gmail'
   URL = 'https://mail.google.com/mail/'
-  SUPPORTED_PLATFORMS = _NO_PLATFORMS
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
 
   def _Login(self, action_runner):
     google_login.LoginGoogleAccount(action_runner, 'googletest',
@@ -304,7 +246,7 @@ class _LoadGmailBaseStory(_SinglePageStory):
 
 
 class LoadGmailDesktopStory(_LoadGmailBaseStory):
-  SUPPORTED_PLATFORMS = _DESKTOP_ONLY
+  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
 
   def _DidLoadDocument(self, action_runner):
     # Wait until the UI loads.
@@ -312,7 +254,7 @@ class LoadGmailDesktopStory(_LoadGmailBaseStory):
         'document.getElementById("loading").style.display === "none"')
 
 class LoadGmailMobileStory(_LoadGmailBaseStory):
-  SUPPORTED_PLATFORMS = _MOBILE_ONLY
+  SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
 
   def _DidLoadDocument(self, action_runner):
     # Close the "Get Inbox by Gmail" interstitial.
@@ -397,11 +339,11 @@ class LoadMiniclipStory(_SinglePageStory):
   # Using "https://" causes "404 Not Found" during WPR recording.
   URL = 'http://www.miniclip.com/games/en/'
   # Desktop only (requires Flash).
-  SUPPORTED_PLATFORMS = _DESKTOP_ONLY
+  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
 
 
 class LoadAlphabettyStory(_SinglePageStory):
   NAME = 'load:games:alphabetty'
   URL = 'https://king.com/play/alphabetty'
   # Desktop only (requires Flash).
-  SUPPORTED_PLATFORMS = _DESKTOP_ONLY
+  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY