[Telemetry] Modify CreatePageSet to CreateStorySet

tools/perf/benchmarks/dom_perf.py

 # Copyright 2013 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.
 
 import json
 import math
 import os
 
 from core import perf_benchmark
 
@@ skipping 90 matching lines @@
   ]
 
   @classmethod
   def Name(cls):
     return 'dom_perf'
 
   def CreatePageTest(self, options):
     del options
     return _DomPerfMeasurement(len(self.RUN_PARAMS))
 
-  def CreatePageSet(self, options):
+  def CreateStorySet(self, options):
     dom_perf_dir = os.path.join(util.GetChromiumSrcDir(), 'data', 'dom_perf')
     ps = page_set.PageSet(base_dir=dom_perf_dir)
     for param in self.RUN_PARAMS:
       ps.AddUserStory(page_module.Page(
           'file://run.html?reportInJS=1&run=%s' % param, ps, ps.base_dir))
     return ps