[Telemetry] Modify CreatePageSet to CreateStorySet

tools/perf/benchmarks/kraken.py

 # Copyright 2012 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.
 
 """Runs Mozilla's Kraken JavaScript benchmark."""
 
 import os
 
 from core import perf_benchmark
 
@@ skipping 107 matching lines @@
   """Mozilla's Kraken JavaScript benchmark.
 
   http://krakenbenchmark.mozilla.org/
   """
   test = _KrakenMeasurement
 
   @classmethod
   def Name(cls):
     return 'kraken'
 
-  def CreatePageSet(self, options):
+  def CreateStorySet(self, options):
     ps = page_set.PageSet(
       archive_data_file='../page_sets/data/kraken.json',
       base_dir=os.path.dirname(os.path.abspath(__file__)),
       bucket=page_set.PARTNER_BUCKET)
     ps.AddUserStory(page_module.Page(
         'http://krakenbenchmark.mozilla.org/kraken-1.1/driver.html',
         ps, ps.base_dir))
     return ps