instrumentation tests: Stop passing a generator to posixpath.join()

build/android/pylib/local/device/local_device_instrumentation_test_run.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 posixpath
 import re
 import time
 
@@ skipping 46 matching lines @@
     self._flag_changers = {}
 
   def TestPackage(self):
     return self._test_instance.suite
 
   def SetUp(self):
     def substitute_device_root(d, device_root):
       if not d:
         return device_root
       elif isinstance(d, list):
-        return posixpath.join(p if p else device_root for p in d)
+        return posixpath.join(*(p if p else device_root for p in d))
       else:
         return d
 
     @local_device_environment.handle_shard_failures_with(
         self._env.BlacklistDevice)
     def individual_device_set_up(dev, host_device_tuples):
       def install_apk():
         if self._test_instance.apk_under_test:
           if self._test_instance.apk_under_test_incremental_install_script:
             local_device_test_run.IncrementalInstall(
@@ skipping 293 matching lines @@
         timeout = v
         break
     else:
       logging.warning('Using default 1 minute timeout for %s', test_name)
       timeout = 60
 
     timeout *= cls._GetTimeoutScaleFromAnnotations(annotations)
 
     return timeout