[Android] Move base tests classes to pylib/base

build/android/pylib/base/base_test_runner.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 contextlib
 import httplib
 import logging
 import os
 import tempfile
 import time
 
-import android_commands
-import constants
-from chrome_test_server_spawner import SpawningServer
-import constants
-from flag_changer import FlagChanger
-from forwarder import Forwarder
+from pylib import android_commands
+from pylib import constants
+from pylib import ports
+from pylib.chrome_test_server_spawner import SpawningServer
+from pylib.flag_changer import FlagChanger
+from pylib.forwarder import Forwarder
+from pylib.valgrind_tools import CreateTool
+# TODO(frankf): Move this to pylib/utils
 import lighttpd_server
-import ports
-from valgrind_tools import CreateTool
 
 
 # A file on device to store ports of net test server. The format of the file is
 # test-spawner-server-port:test-server-port
 NET_TEST_SERVER_PORT_INFO_FILE = 'net-test-server-ports'
 
 
 class BaseTestRunner(object):
   """Base class for running tests on a single device.
 
@@ skipping 170 matching lines @@
       # Wait for 2 seconds then restart.
       time.sleep(2)
     if not server_ready:
       logging.error(';'.join(error_msgs))
       raise Exception('Can not start the test spawner server.')
     self._PushTestServerPortInfoToDevice()
     self._spawner_forwarder = self._CreateAndRunForwarder(
         self.adb,
         [(self.test_server_spawner_port, self.test_server_spawner_port)],
         self.tool, '127.0.0.1', self.build_type)