Add a new benchmark for cpu power measurements on steady state sites.

tools/perf/benchmarks/power.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.
 
 from core import perf_benchmark
 
 from benchmarks import silk_flags
 from measurements import power
 import page_sets
 from telemetry import benchmark
@@ skipping 172 matching lines @@
 
 @benchmark.Enabled('mac')
 class PowerScrollingTrivialPage(perf_benchmark.PerfBenchmark):
   """Measure power consumption for some very simple pages."""
   test = power.QuiescentPower
   page_set = page_sets.MacGpuTrivialPagesStorySet
 
   @classmethod
   def Name(cls):
     return 'power.trivial_pages'
+
+@benchmark.Enabled('mac')
+class PowerSteadyStatePages(perf_benchmark.PerfBenchmark):
+  """Measure power consumption for real web sites in steady state (no user
+  interactions)."""
+  test = power.QuiescentPower
+  page_set = page_sets.IdleAfterLoadingStories
+
+  @classmethod
+  def Name(cls):
+    return 'power.steady_state'