[tools/perf] Reenable qq mobile story

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.
 
 from page_sets.system_health import platforms
 from page_sets.system_health import system_health_story
 
 from telemetry import decorators
 
 
@@ skipping 136 matching lines @@
 
 class NytimesDesktopStory(_NewsBrowsingStory):
   """The third top website in http://www.alexa.com/topsites/category/News"""
   NAME = 'browse:news:nytimes'
   URL = 'http://www.nytimes.com'
   ITEM_SELECTOR = '.story-heading > a'
   SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
 
 
 # Desktop qq.com opens a news item in a separate tab, for which the back button
-# does not work. Mobile qq.com is disabled due to crbug.com/627166.
-@decorators.Disabled('all')

[perezju, 2016/10/03 13:36:49]

should it remain disabled on desktop?

[petrcermak, 2016/10/03 13:40:30]

No, this is the correct way. Desktop is not even considered because
`SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY`.

+# does not work.
 class QqMobileStory(_NewsBrowsingStory):
   NAME = 'browse:news:qq'
   URL = 'http://news.qq.com'
   ITEM_SELECTOR = '.list .full a'
   SUPPORTED_PLATFORMS = platforms.MOBILE_ONLY
 
 
 class RedditDesktopStory(_NewsBrowsingStory):
   """The top website in http://www.alexa.com/topsites/category/News"""
   NAME = 'browse:news:reddit'
@@ skipping 125 matching lines @@
 
 class FacebookPhotosDesktopStory(_MediaBrowsingStory):
   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