Adding dumpsys based power monitor for android.

tools/perf/measurements/smoothness_unittest.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.
 import sys
 
 from measurements import smoothness
 from telemetry.core import wpr_modes
 from telemetry.page import page
 from telemetry.page import page_measurement_unittest_base
 from telemetry.unittest import options_for_unittests
 
 class FakePlatform(object):
   def IsRawDisplayFrameRateSupported(self):
     return False
-  def CanMonitorPowerAsync(self):
+  def CanMonitorPower(self):
     return False
 
 
 class FakeBrowser(object):
   def __init__(self):
     self.platform = FakePlatform()
     self.category_filter = None
 
   def StartTracing(self, category_filter, _):
     self.category_filter = category_filter
@@ skipping 77 matching lines @@
 
     mean_touch_scroll_latency = results.FindAllPageSpecificValuesNamed(
         'mean_touch_scroll_latency')
     if mean_touch_scroll_latency:
       self.assertEquals(len(mean_touch_scroll_latency), 1)
       self.assertGreater(
           mean_touch_scroll_latency[0].GetRepresentativeNumber(), 0)
 
   def testCleanUpTrace(self):
     self.TestTracingCleanedUp(smoothness.Smoothness, self._options)