Test adding perf week tests as smoothness benchmark

tools/perf/benchmarks/smoothness.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 benchmarks import silk_flags
 import page_sets
 from measurements import smoothness
 from telemetry import benchmark
 
 
@@ skipping 156 matching lines @@
   """Measures rendering statistics for the Polymer cases with GPU rasterization
   using bleeding edge rendering fast paths.
   """
   tag = 'fast_path_gpu_rasterization'
   test = smoothness.Smoothness
   page_set = page_sets.PolymerPageSet
   def CustomizeBrowserOptions(self, options):
     super(SmoothnessFastPathGpuRasterizationPolymer, self). \
         CustomizeBrowserOptions(options)
     silk_flags.CustomizeBrowserOptionsForFastPath(options)
+
+class SmoothnessPerfWeek(benchmark.Benchmark):
+  """Measures rendering statistics for big animation benchmarks
+  """
+  tag = 'perf_week'
+  test = smoothness.Smoothness
+  page_set = page_sets.PerfWeekPageSet
+  def CustomizeBrowserOptions(self, options):
+    options.AppendExtraBrowserArgs(
+        ['--enable-experimental-web-platform-features'])