[Android] Switch KillAll, StartActivity, and BroadcastIntent to DeviceUtils.

build/android/pylib/perf/perf_control.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 logging
 
 from pylib import android_commands
 from pylib.device import device_utils
 
 
@@ skipping 72 matching lines @@
       measurement is started.
     - The scaling governor can't be set for an offline CPU and frequency scaling
       on newly enabled CPUs adds noise to both perf and tracing measurements.
 
     It appears Qualcomm is the only vendor that hot-plugs CPUs, and on Qualcomm
     this is done by "mpdecision".
 
     """
     if self._have_mpdecision:
       script = 'stop mpdecision' if force_online else 'start mpdecision'
-      self._device.RunShellCommand(script, root=True)
+      self._device.RunShellCommand(script, as_root=True)
 
     if not self._have_mpdecision and not self._AllCpusAreOnline():
       logging.warning('Unexpected cpu hot plugging detected.')
 
     if not force_online:
       return
 
     for cpu in range(self._num_cpu_cores):
       online_path = PerfControl._CPU_ONLINE_FMT % cpu
       self._device.old_interface.SetProtectedFileContents(
           online_path, '1')