[system-health] Add support for disabling individual stories on individual platforms

tools/perf/page_sets/system_health/loading_stories.py

Index: tools/perf/page_sets/system_health/loading_stories.py
diff --git a/tools/perf/page_sets/system_health/loading_stories.py b/tools/perf/page_sets/system_health/loading_stories.py
index 9db0b955a56285d020dd8288334f03b8a9c7ad09..b24eacf00f01dcd582da0ead0802aeea6e6cca8b 100644
--- a/tools/perf/page_sets/system_health/loading_stories.py
+++ b/tools/perf/page_sets/system_health/loading_stories.py
@@ -8,6 +8,8 @@ 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 import decorators
+
 
 class _LoadingStory(system_health_story.SystemHealthStory):
   """Abstract base class for single-page System Health user stories."""
@@ -80,14 +82,14 @@ class LoadTwitterStory(_LoadingStory):
   URL = 'https://www.twitter.com/nasa'
 
 
+# Due to the deterministic date injected by WPR (February 2008), the cookie 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).
+@decorators.Disabled('android')
 class LoadVkStory(_LoadingStory):
   NAME = 'load:social:vk'
   URL = 'https://vk.com/sbeatles'
-  # Due to the deterministic date injected by WPR (February 2008), the cookie
-  # 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 = platforms.DESKTOP_ONLY
 
 
 class LoadInstagramStory(_LoadingStory):
@@ -163,7 +165,7 @@ class LoadRedditMobileStory(_LoadingStory):
   SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
 
 
-class LoadSohuStory(_LoadingStory):
+class LoadSohuMobileStory(_LoadingStory):
   NAME = 'load:news:sohu'
   # Using "https://" leads to missing images and scripts on mobile (due to
   # mixed content).
@@ -256,13 +258,13 @@ class LoadFacebookPhotosMobileStory(_LoadingStory):
   SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
 
 
+# Recording currently does not work. The page gets stuck in the theater viewer.
+@decorators.Disabled('all')
 class LoadFacebookPhotosDesktopStory(_LoadingStory):
   NAME = 'load:media:facebook_photos'
   URL = (
       'https://www.facebook.com/rihanna/photos/a.207477806675.138795.10092511675/10153911739606676/?type=3&theater')
-  # Recording currently does not work. The page gets stuck in the
-  # theater viewer.
-  SUPPORTED_PLATFORMS = platforms.NO_PLATFORMS
+  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
 
 
 ################################################################################
@@ -389,12 +391,10 @@ class LoadMiniclipStory(_LoadingStory):
   NAME = 'load:games:miniclip'
   # Using "https://" causes "404 Not Found" during WPR recording.
   URL = 'http://www.miniclip.com/games/en/'
-  # Desktop only (requires Flash).
-  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
+  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY  # Requires Flash.
 
 
 class LoadAlphabettyStory(_LoadingStory):
   NAME = 'load:games:alphabetty'
   URL = 'https://king.com/play/alphabetty'
-  # Desktop only (requires Flash).
-  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
+  SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY  # Requires Flash.