[Telemetry] Remove is_smooth flag.

tools/perf/page_sets/tough_texture_upload_cases.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 ToughTextureUploadCasesPage(page_module.Page):
 
   def __init__(self, url, page_set):
     super(
       ToughTextureUploadCasesPage,
       self).__init__(
         url=url,
         page_set=page_set)
 
   def RunPageInteractions(self, action_runner):
     interaction = action_runner.BeginGestureInteraction(
-        'ScrollAction', is_smooth=True)
+        'ScrollAction')
     action_runner.ScrollPage()
     interaction.End()
 
 
 class ToughTextureUploadCasesPageSet(page_set_module.PageSet):
 
   """
   Description: A collection of texture upload performance tests
   """
 
   def __init__(self):
     super(ToughTextureUploadCasesPageSet, self).__init__()
 
     urls_list = [
       'file://tough_texture_upload_cases/background_color_animation.html',
       # pylint: disable=C0301
       'file://tough_texture_upload_cases/background_color_animation_and_transform_animation.html',
       # pylint: disable=C0301
       'file://tough_texture_upload_cases/background_color_animation_with_gradient.html',
       # pylint: disable=C0301
       'file://tough_texture_upload_cases/background_color_animation_with_gradient_and_transform_animation.html']
     for url in urls_list:
       self.AddUserStory(ToughTextureUploadCasesPage(url, self))