[Android][Telemetry] Add logging and temporarily ensure StopMonitoringPower is called.

tools/perf/metrics/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.
 import logging
 import time
 
 from telemetry.util import process_statistic_timeline_data
 from telemetry.value import scalar
 
 from metrics import Metric
@@ skipping 73 matching lines @@
     self._running = True
 
   def Stop(self, _, tab):
     if (not self._platform.CanMonitorPower() or
         not self._browser.supports_power_metrics):
       return
 
     self._StopInternal()
 
   def Close(self):
+    # TODO(rnephew): Remove when crbug.com/553601 is solved.
+    logging.info('Closing power monitors')
     if self._platform.IsMonitoringPower():
       self._platform.StopMonitoringPower()
 
   def AddResults(self, _, results):
     """Add the collected power data into the results object.
 
     This function needs to be robust in the face of differing power data on
     various platforms. Therefore data existence needs to be checked when
     building up the results. Additionally 0 is a valid value for many of the
     metrics here which is why there are plenty of checks for 'is not None'
@@ skipping 101 matching lines @@
       continue
 
     assert isinstance(cpu_stats[process_type]['IdleWakeupCount'],
         process_statistic_timeline_data.IdleWakeupTimelineData)
     idle_wakeup_delta = (cpu_stats[process_type]['IdleWakeupCount'] -
                         start_cpu_stats[process_type]['IdleWakeupCount'])
     cpu_delta[process_type] = idle_wakeup_delta.total_sum()
     total = total + cpu_delta[process_type]
   cpu_delta['Total'] = total
   return cpu_delta