[Android] Allow gtests to pull app data off the device before clearing it.

build/android/pylib/gtest/gtest_test_instance.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 re
 import shutil
 import sys
+import tempfile
 
 from pylib import constants
 from pylib.base import base_test_result
 from pylib.base import test_instance
 
 sys.path.append(os.path.join(
     constants.DIR_SOURCE_ROOT, 'build', 'util', 'lib', 'common'))
 import unittest_util
 
 
@@ skipping 100 matching lines @@
       self._gtest_filter = None
     if args.isolate_file_path:
       self._isolate_abs_path = os.path.abspath(args.isolate_file_path)
       self._isolate_delegate = isolate_delegate
       self._isolated_abs_path = os.path.join(
           constants.GetOutDirectory(), '%s.isolated' % self._suite)
     else:
       logging.warning('No isolate file provided. No data deps will be pushed.');
       self._isolate_delegate = None
 
+    if args.app_data_files:
+      self._app_data_files = args.app_data_files
+      if args.app_data_file_dir:
+        self._app_data_file_dir = args.app_data_file_dir
+      else:
+        self._app_data_file_dir = tempfile.mkdtemp()
+        logging.critical('Saving app files to %s', self._app_data_file_dir)
+    else:
+      self._app_data_files = None
+      self._app_data_file_dir = None
+
   #override
   def TestType(self):
     return 'gtest'
 
   #override
   def SetUp(self):
     """Map data dependencies via isolate."""
     if self._isolate_delegate:
       self._isolate_delegate.Remap(
           self._isolate_abs_path, self._isolated_abs_path)
@@ skipping 85 matching lines @@
   def TearDown(self):
     """Clear the mappings created by SetUp."""
     if self._isolate_delegate:
       self._isolate_delegate.Clear()
 
   @property
   def apk(self):
     return self._apk_path
 
   @property
+  def app_file_dir(self):
+    return self._app_data_file_dir
+
+  @property
+  def app_files(self):
+    return self._app_data_files
+
+  @property
   def exe(self):
     return self._exe_path
 
   @property
   def suite(self):
     return self._suite