[Telemetry] Remove is_smooth flag.

tools/perf/page_sets/top_10_mobile.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.
 from telemetry.page import page as page_module
 from telemetry.page import page_set as page_set_module
 
 
 class Top10MobilePage(page_module.Page):
 
   def __init__(self, url, page_set, run_no_page_interactions):
     super(Top10MobilePage, self).__init__(
         url=url, page_set=page_set, credentials_path = 'data/credentials.json')
     self.user_agent_type = 'mobile'
     self.archive_data_file = 'data/top_10_mobile.json'
     self._run_no_page_interactions = run_no_page_interactions
 
   def RunPageInteractions(self, action_runner):
     if self._run_no_page_interactions:
       return
     interaction = action_runner.BeginGestureInteraction(
-        'ScrollAction', is_smooth=True)
+        'ScrollAction')
     action_runner.ScrollPage()
     interaction.End()
 
 
 class Top10MobilePageSet(page_set_module.PageSet):
 
   """ Top 10 mobile sites """
 
   def __init__(self, run_no_page_interactions=False):
     super(Top10MobilePageSet, self).__init__(
@@ skipping 28 matching lines @@
       # Why: #13 (Alexa) most visited page worldwide, picked the first real
       # page
       'http://m.taobao.com/channel/act/mobile/20131111-women.html',
       # Why: #18 (Alexa) most visited page worldwide, picked a reasonable
       # search term
       'http://yandex.ru/touchsearch?text=science',
     ]
 
     for url in urls_list:
       self.AddUserStory(Top10MobilePage(url, self, run_no_page_interactions))