Update webpages_playback script and all page_sets to use new skpicture_printer benchmark

tools/skp/page_sets/skia_chalkboard_desktop.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 = 'desktop'
     self.archive_data_file = 'data/skia_chalkboard_desktop.json'
 
   def RunSmoothness(self, action_runner):
     action_runner.ScrollElement()
 
   def RunNavigateSteps(self, action_runner):
     action_runner.NavigateToPage(self)
     action_runner.Wait(15)
 
 
-class SkiaBuildbotPageSet(page_set_module.PageSet):
+class ChalkboardDesktopPageSet(page_set_module.PageSet):
 
   """ Pages designed to represent the median, not highly optimized web """
 
   def __init__(self):
-    super(SkiaBuildbotPageSet, self).__init__(
+    super(ChalkboardDesktopPageSet, self).__init__(
       user_agent_type='desktop',
       archive_data_file='data/skia_chalkboard_desktop.json')
 
     urls_list = [
       # Why: from fmalita
       ('http://ie.microsoft.com/testdrive/Performance/Chalkboard/Images/'
        'Chalkboard.svg'),
     ]
 
     for url in urls_list:
       self.AddPage(SkiaBuildbotDesktopPage(url, self))