[Telemetry] Modify CreatePageSet to CreateStorySet

tools/telemetry/telemetry/record_wpr_unittest.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.
 
 import os
 import sys
 
 from telemetry import benchmark
 from telemetry import record_wpr
 from telemetry.core import util
@@ skipping 54 matching lines @@
     self.func_calls.append('DidStartBrowser')
 
 class MockBenchmark(benchmark.Benchmark):
   test = MockPageTest
   mock_page_set = None
 
   @classmethod
   def AddBenchmarkCommandLineArgs(cls, group):
     group.add_option('', '--mock-benchmark-url', action='store', type='string')
 
-  def CreatePageSet(self, options):
+  def CreateStorySet(self, options):
     kwargs = {}
     if options.mock_benchmark_url:
       kwargs['url'] = options.mock_benchmark_url
     self.mock_page_set = MockPageSet(**kwargs)
     return self.mock_page_set
 
 
 class RecordWprUnitTests(tab_test_case.TabTestCase):
 
   _base_dir = util.GetUnittestDataDir()
@@ skipping 101 matching lines @@
     record_page_test.page_test = MockBenchmark().test()
     wpr_recorder = record_wpr.WprRecorder(self._test_data_dir, MockBenchmark(),
                                           flags)
     record_page_test.CustomizeBrowserOptions(wpr_recorder.options)
     record_page_test.WillStartBrowser(self._tab.browser.platform)
     record_page_test.DidStartBrowser(self._tab.browser)
     self.assertTrue(
         'CustomizeBrowserOptions' in record_page_test.page_test.func_calls)
     self.assertTrue('WillStartBrowser' in record_page_test.page_test.func_calls)
     self.assertTrue('DidStartBrowser' in record_page_test.page_test.func_calls)