[tools/perf] Enable many more lint checks for perf directory.

tools/perf/page_sets/system_health/loading_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 page_sets.login_helpers import dropbox_login
 from page_sets.login_helpers import google_login
 
@@ skipping 300 matching lines @@
     # Close the "Get Inbox by Gmail" interstitial.
     action_runner.WaitForJavaScriptCondition(
         'document.querySelector("#isppromo a") !== null')
     action_runner.ExecuteJavaScript(
         'document.querySelector("#isppromo a").click()')
     # Wait until the UI loads.
     action_runner.WaitForJavaScriptCondition(
         'document.getElementById("apploadingdiv").style.height === "0px"')
 
 
+

[petrcermak, 2016/08/11 08:51:13]

nit: Too many blank lines here (should be only 2)

[nednguyen, 2016/08/11 12:30:30]

Done.

 class LoadMapsStory(_LoadingStory):
   NAME = 'load:tools:maps'
   URL = 'https://www.google.com/maps/place/London,+UK/'
 
 
 class LoadStackOverflowStory(_LoadingStory):
   NAME = 'load:tools:stackoverflow'
   URL = (
       'https://stackoverflow.com/questions/36827659/compiling-an-application-for-use-in-highly-radioactive-environments')
 
@@ skipping 60 matching lines @@
   URL = 'http://www.miniclip.com/games/en/'
   # Desktop only (requires Flash).
   SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY
 
 
 class LoadAlphabettyStory(_LoadingStory):
   NAME = 'load:games:alphabetty'
   URL = 'https://king.com/play/alphabetty'
   # Desktop only (requires Flash).
   SUPPORTED_PLATFORMS = platforms.DESKTOP_ONLY