Adding page cycler benchmark on the key mobile sites archive.

tools/perf/benchmarks/page_cycler.py

 # Copyright (c) 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 sys
 
 from telemetry import test
 
 from measurements import page_cycler
 
 
@@ skipping 78 matching lines @@
     # This option will still apply to page cyclers that run after this one.
     self.test.clear_cache_before_each_run = True
 
 
 class PageCyclerTop10Mobile(test.Test):
   test = page_cycler.PageCycler
   page_set = 'page_sets/top_10_mobile.json'
   options = {'pageset_repeat_iters': 10}
 
 
+class PageCyclerKeyMobileSites(test.Test):
+  test = page_cycler.PageCycler
+  page_set = 'page_sets/key_mobile_sites.json'
+  options = {'pageset_repeat_iters': 10}
+
+
 class PageCyclerToughLayoutCases(test.Test):
   test = page_cycler.PageCycler
   page_set = 'page_sets/tough_layout_cases.json'
   options = {'pageset_repeat_iters': 10}
 
 
 class PageCyclerTypical25(test.Test):
   # crbug.com/273986: This test is really flakey on xp.
   enabled = not sys.platform.startswith('win')
   test = page_cycler.PageCycler
   page_set = 'page_sets/typical_25.json'
   options = {'pageset_repeat_iters': 10}