[Andoid] Threaded TestRunner creation and SetUp and TearDown calls.

build/android/pylib/gtest/test_package_apk.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 os
 import shlex
 import sys
 import tempfile
 import time
@@ skipping 55 matching lines @@
         print 'Fifo created...'
         break
       time.sleep(i)
     else:
       raise errors.DeviceUnresponsiveError(
           'Unable to find fifo on device %s ' % self._GetFifo())
     args = shlex.split(self.adb.Adb()._target_arg)
     args += ['shell', 'cat', self._GetFifo()]
     return pexpect.spawn('adb', args, timeout=timeout, logfile=logfile)
 
+  def ClearApplicationState(self):
+    """Clear the application state."""
+    self.adb.ClearApplicationState(self._apk_package_name)
+
   def GetAllTests(self):
     """Returns a list of all tests available in the test suite."""
     self._CreateTestRunnerScript('--gtest_list_tests')
     try:
       self.tool.SetupEnvironment()
       # Clear and start monitoring logcat.
       self._ClearFifo()
       self.adb.RunShellCommand(
           'am start -n ' + self._apk_package_name + '/' +
           self._test_activity_name)
@@ skipping 28 matching lines @@
     self.tool.CopyFiles()
     # Always uninstall the previous one (by activity name); we don't
     # know what was embedded in it.
     self.adb.ManagedInstall(self.test_suite_full, False,
                             package_name=self._apk_package_name)
 
   def _GetTestSuiteBaseName(self):
     """Returns the  base name of the test suite."""
     # APK test suite names end with '-debug.apk'
     return os.path.basename(self.test_suite).rsplit('-debug', 1)[0]