[Android] Switch to DeviceUtils versions of file functions.

tools/android/adb_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 57 matching lines @@
     self._device.RunShellCommand('kill -SIGINT ' + ' '.join(perf_pids))
     self._perf_process.wait()
     self._perf_control.SetDefaultPerfMode()
 
   def _FailWithLog(self, msg):
     self._log_file.seek(0)
     log = self._log_file.read()
     raise RuntimeError('%s. Log output:\n%s' % (msg, log))
 
   def PullResult(self, output_path):
-    if not self._device.old_interface.FileExistsOnDevice(
-        self._output_file.name):
+    if not self._device.FileExists(self._output_file.name):
       self._FailWithLog('Perf recorded no data')
 
     perf_profile = os.path.join(output_path,
                                 os.path.basename(self._output_file.name))
-    self._device.old_interface.PullFileFromDevice(self._output_file.name,
-                                                  perf_profile)
+    self._device.PullFile(self._output_file.name, perf_profile)
     if not os.stat(perf_profile).st_size:
       os.remove(perf_profile)
       self._FailWithLog('Perf recorded a zero-sized file')
 
     self._log_file.close()
     self._output_file.close()
     return perf_profile
 
 
 class PerfProfilerController(controllers.BaseController):
@@ skipping 85 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