Revert of [Android] Refactor the native test wrappers.

build/android/pylib/instrumentation/instrumentation_test_instance.py

 # Copyright 2015 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 pickle
 import re
 import sys
 
@@ skipping 183 matching lines @@
         '%s.jar' % self._suite)
     self._test_support_apk = os.path.join(
         constants.GetOutDirectory(), constants.SDK_BUILD_TEST_JAVALIB_DIR,
         '%sSupport.apk' % self._suite)
 
     if not os.path.exists(self._test_apk):
       error_func('Unable to find test APK: %s' % self._test_apk)
     if not os.path.exists(self._test_jar):
       error_func('Unable to find test JAR: %s' % self._test_jar)
 
-    apk = apk_helper.ApkHelper(self.test_apk)
-    self._test_package = apk.GetPackageName()
-    self._test_runner = apk.GetInstrumentationName()
+    self._test_package = apk_helper.GetPackageName(self.test_apk)
+    self._test_runner = apk_helper.GetInstrumentationName(self.test_apk)
 
     self._package_info = None
     for package_info in constants.PACKAGE_INFO.itervalues():
       if self._test_package == package_info.test_package:
         self._package_info = package_info
     if not self._package_info:
       logging.warning('Unable to find package info for %s', self._test_package)
 
   def _initializeDataDependencyAttributes(self, args, isolate_delegate):
     self._data_deps = []
@@ skipping 51 matching lines @@
     if hasattr(args, 'device_flags_file') and args.device_flags_file:
       with open(args.device_flags_file) as device_flags_file:
         stripped_lines = (l.strip() for l in device_flags_file)
         self._flags.extend([flag for flag in stripped_lines if flag])
 
   def _initializeDriverAttributes(self):
     self._driver_apk = os.path.join(
         constants.GetOutDirectory(), constants.SDK_BUILD_APKS_DIR,
         'OnDeviceInstrumentationDriver.apk')
     if os.path.exists(self._driver_apk):
-      driver_apk = apk_helper.ApkHelper(self._driver_apk)
-      self._driver_package = driver_apk.GetPackageName()
-      self._driver_name = driver_apk.GetInstrumentationName()
+      self._driver_package = apk_helper.GetPackageName(
+          self._driver_apk)
+      self._driver_name = apk_helper.GetInstrumentationName(
+          self._driver_apk)
     else:
       self._driver_apk = None
 
   @property
   def apk_under_test(self):
     return self._apk_under_test
 
   @property
   def flags(self):
     return self._flags
@@ skipping 225 matching lines @@
   def GenerateTestResults(
       result_code, result_bundle, statuses, start_ms, duration_ms):
     return GenerateTestResults(result_code, result_bundle, statuses,
                                start_ms, duration_ms)
 
   #override
   def TearDown(self):
     if self._isolate_delegate:
       self._isolate_delegate.Clear()