[Android] Switch to DeviceUtils versions of GetMemoryUsageForPid and __str__.

tools/profile_chrome/perf_controller.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 os
 import subprocess
 import sys
 import tempfile
 
@@ skipping 32 matching lines @@
 ]
 
 
 class _PerfProfiler(object):
   def __init__(self, device, perf_binary, categories):
     self._device = device
     self._output_file = android_commands.DeviceTempFile(
         self._device.old_interface, prefix='perf_output')
     self._log_file = tempfile.TemporaryFile()
 
-    device_param = (['-s', self._device.old_interface.GetDevice()]
-                    if self._device.old_interface.GetDevice() else [])
+    # TODO(jbudorick) Look at providing a way to unhandroll this once the
+    #                 adb rewrite has fully landed.
+    device_param = (['-s', str(self._device)] if str(self._device) else [])
     cmd = ['adb'] + device_param + \
           ['shell', perf_binary, 'record',
            '--output', self._output_file.name] + _PERF_OPTIONS
     if categories:
       cmd += ['--event', ','.join(categories)]
     self._perf_control = perf_control.PerfControl(self._device)
     self._perf_control.SetPerfProfilingMode()
     self._perf_process = subprocess.Popen(cmd,
                                           stdout=self._log_file,
                                           stderr=subprocess.STDOUT)
@@ skipping 113 matching lines @@
         open(json_file_name, 'w') as json_file:
       cmd = [perfhost_path, 'script', '-s', perf_script_path, '-i',
              perf_profile, '--symfs', symfs_dir, '--kallsyms', kallsyms]
       if subprocess.call(cmd, stdout=json_file, stderr=dev_null):
         logging.warning('Perf data to JSON conversion failed. The result will '
                         'not contain any perf samples. You can still view the '
                         'perf data manually as shown above.')
         return None
 
     return json_file_name