Manual partial update from from https://crrev.com/337502

build/android/pylib/uiautomator/test_runner.py

 # Copyright (c) 2013 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.
 
 """Class for running uiautomator tests on a single device."""
 
 from pylib import constants
 from pylib import flag_changer
 from pylib.device import intent
 from pylib.instrumentation import test_options as instr_test_options
@@ skipping 23 matching lines @@
         test_options.screenshot_failures,
         wait_for_debugger=False,
         coverage_dir=None,
         test_apk=None,
         test_apk_path=None,
         test_apk_jar_path=None,
         test_runner=None,
         test_support_apk_path=None,
         device_flags=None,
         isolate_file_path=None,
-        set_asserts=test_options.set_asserts)
+        set_asserts=test_options.set_asserts,
+        delete_stale_data=False)
     super(TestRunner, self).__init__(instrumentation_options, device,
                                      shard_index, test_pkg)
 
     cmdline_file = constants.PACKAGE_INFO[test_options.package].cmdline_file
     self.flags = None
     if cmdline_file:
       self.flags = flag_changer.FlagChanger(self.device, cmdline_file)
     self._package = constants.PACKAGE_INFO[test_options.package].package
     self._activity = constants.PACKAGE_INFO[test_options.package].activity
 
@@ skipping 24 matching lines @@
 
   #override
   def _GenerateTestResult(self, test, _result_code, _result_bundle, statuses,
                           start_ms, duration_ms):
     # uiautomator emits its summary status with INSTRUMENTATION_STATUS_CODE,
     # not INSTRUMENTATION_CODE, so we have to drop if off the list of statuses.
     summary_code, summary_bundle = statuses[-1]
     return super(TestRunner, self)._GenerateTestResult(
         test, summary_code, summary_bundle, statuses[:-1], start_ms,
         duration_ms)