[Telemetry] Make "discard_first_result" apply to user_stories too.

tools/perf/benchmarks/page_cycler.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.
 
 from measurements import page_cycler
 import page_sets
 from telemetry import benchmark
 
 
 class _PageCycler(benchmark.Benchmark):
   options = {'pageset_repeat': 6}
 
   @classmethod
   def Name(cls):
     return 'page_cycler'
 
   @classmethod
   def AddBenchmarkCommandLineArgs(cls, parser):
     parser.add_option('--report-speed-index',
         action='store_true',
         help='Enable the speed index metric.')
 
     parser.add_option('--cold-load-percent', type='int', default=50,
                       help='%d of page visits for which a cold load is forced')
 
+  @classmethod
+  def ProcessCommandLineArgs(cls, parser, args):

[nednguyen, 2015/02/27 13:27:35]

Don't you need to call super class' ProcessCommandLineArgs?

+    args.discard_first_result = args.cold_load_percent == 0
+
   def CreatePageTest(self, options):
     return page_cycler.PageCycler(
         page_repeat = options.page_repeat,
         pageset_repeat = options.pageset_repeat,
         cold_load_percent = options.cold_load_percent,
         report_speed_index = options.report_speed_index)
 
 
 # This is an old page set, we intend to remove it after more modern benchmarks
 # work on CrOS.
@@ skipping 176 matching lines @@
     return page_sets.Typical25PageSet(run_no_page_interactions=True)
 
 
 @benchmark.Disabled # crbug.com/443730
 class PageCyclerBigJs(_PageCycler):
   page_set = page_sets.BigJsPageSet
   @classmethod
   def Name(cls):
     return 'page_cycler.big_js'
 
+