[Android] Switch to DeviceUtils versions of Ls, SetJavaAsserts, GetProp, and SetProp.

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 28 matching lines @@
     """Sets the highest possible performance mode for the device."""
     self._ForceAllCpusOnline(True)
     self._SetScalingGovernorInternal('performance')
     if not self._AllCpusAreOnline():
       if not self._device.old_interface.IsRootEnabled():
         raise RuntimeError('Need root to force CPUs online.')
       raise RuntimeError('Failed to force CPUs online.')
 
   def SetDefaultPerfMode(self):
     """Sets the performance mode for the device to its default mode."""
-    product_model = self._device.old_interface.GetProductModel()
+    product_model = self._device.GetProp('ro.product.model')
     governor_mode = {
         'GT-I9300': 'pegasusq',
         'Galaxy Nexus': 'interactive',
         'Nexus 4': 'ondemand',
         'Nexus 7': 'interactive',
         'Nexus 10': 'interactive'
     }.get(product_model, 'ondemand')
     self._SetScalingGovernorInternal(governor_mode)
     self._ForceAllCpusOnline(False)
 
@@ skipping 32 matching lines @@
 
     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.WriteFile(online_path, '1', as_root=True)