[PCv2] Migrate tough_layout_cases page set

tools/perf/benchmarks/page_cycler_v2.py

 # Copyright 2016 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.
 
 """The page cycler v2.
 
 For details, see design doc:
 https://docs.google.com/document/d/1EZQX-x3eEphXupiX-Hq7T4Afju5_sIdxPWYetj7ynd0
 """
 
@@ skipping 137 matching lines @@
   """
 
   @classmethod
   def Name(cls):
     return 'page_cycler_v2.top_10_mobile'
 
   def CreateStorySet(self, options):
     return page_sets.Top10MobilePageSet(run_no_page_interactions=True,
         cache_temperatures=[
             cache_temperature.PCV1_COLD, cache_temperature.PCV1_WARM])
+
+
+class PageCyclerV2ToughLayoutCases(_PageCyclerV2):
+  """Page loading for the slowest layouts observed in the Alexa top 1 million.
+
+  Recorded in July 2013.
+  """
+  page_set = page_sets.ToughLayoutCasesPageSet
+
+  @classmethod
+  def Name(cls):
+    return 'page_cycler_v2.tough_layout_cases'
+
+  def CreateStorySet(self, options):
+    return page_sets.ToughLayoutCasesPageSet(cache_temperatures=[
+          cache_temperature.PCV1_COLD, cache_temperature.PCV1_WARM])