[system-health] Rename browse:media:facebook to browse:media:facebook_photos

tools/perf/page_sets/system_health/system_health_story.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 logging
 
 from page_sets.system_health import platforms
 
 from telemetry.page import page
 
 
 _DUMP_WAIT_TIME = 3
 
 
 class _MetaSystemHealthStory(type):
   """Metaclass for SystemHealthStory."""
 
   @property
   def ABSTRACT_STORY(cls):
     """Class field marking whether the class is abstract.
 
     If true, the story will NOT be instantiated and added to a System Health
     story set. This field is NOT inherited by subclasses (that's why it's
     defined on the metaclass).
     """
-    return cls.__dict__.get('__ABSTRACT_STORY__', False)
-
-  @ABSTRACT_STORY.setter
-  def ABSTRACT_STORY(cls, ABSTRACT_STORY):
-    cls.__dict__['__ABSTRACT_STORY__'] = ABSTRACT_STORY
+    return cls.__dict__.get('ABSTRACT_STORY', False)
 
 
 class SystemHealthStory(page.Page):
   """Abstract base class for System Health user stories."""
   __metaclass__ = _MetaSystemHealthStory
 
   # The full name of a single page story has the form CASE:GROUP:PAGE (e.g.
   # 'load:search:google').
   NAME = NotImplemented
   URL = NotImplemented
@@ skipping 30 matching lines @@
     pass
 
   def RunNavigateSteps(self, action_runner):
     self._Login(action_runner)
     super(SystemHealthStory, self).RunNavigateSteps(action_runner)
 
   def RunPageInteractions(self, action_runner):
     action_runner.tab.WaitForDocumentReadyStateToBeComplete()
     self._DidLoadDocument(action_runner)
     self._Measure(action_runner)