Add a slimming paint variant of the typical 25 page cycler benchmark

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):
@@ skipping 211 matching lines @@
   @classmethod
   def Name(cls):
     return 'page_cycler_oopif.typical_25'
 
   def CustomizeBrowserOptions(self, options):
     options.AppendExtraBrowserArgs(['--site-per-process'])
 
   def CreatePageSet(self, options):
     return page_sets.Typical25PageSet(run_no_page_interactions=True)
 
+# crbug.com/273986: This test is flakey on Windows.
+@benchmark.Disabled('win')
+class PageCyclerSlimmingPaintTypical25(_PageCycler):
+  """A varation of the typical 25 benchmark, but running with
+  --enable-slimming-paint to measure slimming paint.
+  """
+  @classmethod
+  def Name(cls):
+    return 'page_cycler_slimming_paint.typical_25'
+
+  def CustomizeBrowserOptions(self, options):
+    options.AppendExtraBrowserArgs(['--enable-slimming-paint'])
+
+  def CreatePageSet(self, options):
+    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'