Add support for Junit tests in platform mode.

build/android/pylib/local/device/local_device_perf_test_run.py

 # Copyright 2016 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 io
 import json
 import logging
 import os
 import pickle
 import shutil
@@ skipping 316 matching lines @@
 
   def __init__(self, env, test_instance):
     super(LocalDevicePerfTestRun, self).__init__(env, test_instance)
     self._devices = None
     self._env = env
     self._no_device_tests = {}
     self._test_buckets = []
     self._test_instance = test_instance
     self._timeout = None if test_instance.no_timeout else self._DEFAULT_TIMEOUT
 
+  #override
   def SetUp(self):
     if os.path.exists(constants.PERF_OUTPUT_DIR):
       shutil.rmtree(constants.PERF_OUTPUT_DIR)
     os.makedirs(constants.PERF_OUTPUT_DIR)
 
+  #override
   def TearDown(self):
     pass
 
   def _GetStepsFromDict(self):
     # From where this is called one of these two must be set.
     if self._test_instance.single_step:
       return {
           'version': self._CONFIG_VERSION,
           'steps': {
               'single_step': {
@@ skipping 156 matching lines @@
   # override
   def _RunTest(self, _device, _test):
     raise NotImplementedError
 
 
 class TestDictVersionError(Exception):
   pass
 
 class PerfTestRunGetStepsError(Exception):
   pass