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

build/android/pylib/gtest/test_runner.py

 # Copyright (c) 2012 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 re
 
 from pylib import constants
 from pylib import pexpect
@@ skipping 113 matching lines @@
             break
           else:  # re_fail
             results.AddResult(base_test_result.BaseTestResult(
                 full_test_name, base_test_result.ResultType.FAIL, log=log))
     except pexpect.EOF:
       logging.error('Test terminated - EOF')
       # We're here because either the device went offline, or the test harness
       # crashed without outputting the CRASHED marker (crbug.com/175538).
       if not self.device.IsOnline():
         raise device_errors.DeviceUnreachableError(
-            'Device %s went offline.' % self.device.old_interface.GetDevice())
+            'Device %s went offline.' % str(self.device))
       if full_test_name:
         results.AddResult(base_test_result.BaseTestResult(
             full_test_name, base_test_result.ResultType.CRASH,
             log=p.before.replace('\r', '')))
     except pexpect.TIMEOUT:
       logging.error('Test terminated after %d second timeout.',
                     self._timeout)
       if full_test_name:
         results.AddResult(base_test_result.BaseTestResult(
             full_test_name, base_test_result.ResultType.TIMEOUT,
@@ skipping 44 matching lines @@
     self.tool.SetupEnvironment()
 
   #override
   def TearDown(self):
     """Cleans up the test enviroment for the test suite."""
     if _TestSuiteRequiresHighPerfMode(self.test_package.suite_name):
       self._perf_controller.SetDefaultPerfMode()
     self.test_package.ClearApplicationState(self.device)
     self.tool.CleanUpEnvironment()
     super(TestRunner, self).TearDown()