Rename AddPage -> AddUserStory in tools/perf/page_sets/.

tools/perf/page_sets/tough_compositor_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 ToughCompositorPage(page_module.Page):
 
   def __init__(self, url, page_set):
@@ skipping 55 matching lines @@
       'http://jsbin.com/falefice/1/quiet?CC_POSTER_CIRCLE',
       # Why: JS poster circle animates/commits many layers """
       'http://jsbin.com/giqafofe/1/quiet?JS_POSTER_CIRCLE',
       # Why: JS invalidation does lots of uploads """
       'http://jsbin.com/beqojupo/1/quiet?JS_FULL_SCREEN_INVALIDATION',
       # Why: Creates a large number of new tilings """
       'http://jsbin.com/covoqi/1/quiet?NEW_TILINGS',
     ]
 
     for url in scroll_urls_list:
-      self.AddPage(ToughCompositorScrollPage(url, self))
+      self.AddUserStory(ToughCompositorScrollPage(url, self))
 
     for url in wait_urls_list:
-      self.AddPage(ToughCompositorWaitPage(url, self))
+      self.AddUserStory(ToughCompositorWaitPage(url, self))