Disable browse:tech:discourse_infinite_scroll on Linux

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 facebook_login
@@ skipping 830 matching lines @@
         action_runner.Wait(self.TIME_BEFORE_SCROLL_RETRY_IN_SECONDS)
       else:
         retry_count = 0
         remaining = new_remaining
 
   @classmethod
   def GenerateStoryDescription(cls):
     return 'Load %s then make a very long scroll.' % cls.URL
 
 
-@decorators.Disabled('win')  # crbug.com/728152
+@decorators.Disabled('win', 'linux')  # crbug.com/728152
 class DiscourseDesktopStory(_InfiniteScrollStory):
   NAME = 'browse:tech:discourse_infinite_scroll'
   URL = ('https://meta.discourse.org/t/the-official-discourse-tags-plugin-discourse-tagging/26482')
   SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
   TAGS = [story_tags.INFINITE_SCROLL]
 
 
 class DiscourseMobileStory(_InfiniteScrollStory):
   NAME = 'browse:tech:discourse_infinite_scroll'
   URL = ('https://meta.discourse.org/t/the-official-discourse-tags-plugin-discourse-tagging/26482')
@@ skipping 47 matching lines @@
   NAME = 'browse:social:tumblr_infinite_scroll'
   URL = 'http://techcrunch.tumblr.com/'  # This page doesn't support HTTPS.
   TAGS = [story_tags.INFINITE_SCROLL]
 
 
 class TwitterScrollDesktopStory(_InfiniteScrollStory):
   NAME = 'browse:social:twitter_infinite_scroll'
   URL = 'https://twitter.com/taylorswift13'
   SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
   TAGS = [story_tags.INFINITE_SCROLL]