Increase timeout of ukwsj to get more consistent SKP captures

tools/skp/page_sets/skia_ukwsj_nexus10.py

 # Copyright 2014 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.
 # pylint: disable=W0401,W0614
 
 
 from telemetry.page import page as page_module
 from telemetry.page import page_set as page_set_module
 
 
 class SkiaBuildbotDesktopPage(page_module.Page):
 
   def __init__(self, url, page_set):
     super(SkiaBuildbotDesktopPage, self).__init__(
         url=url,
         page_set=page_set,
         credentials_path='data/credentials.json')
     self.user_agent_type = 'tablet'
     self.archive_data_file = 'data/skia_ukwsj_nexus10.json'
 
   def RunNavigateSteps(self, action_runner):
     action_runner.NavigateToPage(self)
-    action_runner.Wait(5)
+    action_runner.Wait(15)
 
 
 class SkiaUkwsjNexus10PageSet(page_set_module.PageSet):
 
   """ Pages designed to represent the median, not highly optimized web """
 
   def __init__(self):
     super(SkiaUkwsjNexus10PageSet, self).__init__(
       user_agent_type='tablet',
       archive_data_file='data/skia_ukwsj_nexus10.json')
 
     urls_list = [
       # Why: for Clank CY
       'http://uk.wsj.com/home-page',
     ]
 
     for url in urls_list:
       self.AddUserStory(SkiaBuildbotDesktopPage(url, self))