Move site_chrome_test, site_logging, site_log_reader, site_crash_test into cros dir.

client/cros/chrome_test.py

 # Copyright (c) 2010 The Chromium OS 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, os, re, shutil, subprocess, tempfile, utils
-from autotest_lib.client.cros import constants, login
+import common
+import constants, login, ui
 from autotest_lib.client.bin import test
 from autotest_lib.client.common_lib import error, global_config
-from autotest_lib.client.cros import ui
 
 class ChromeTestBase(test.test):
     home_dir = None
 
     def setup(self):
         self.job.setup_dep(['chrome_test'])
         # create a empty srcdir to prevent the error that checks .version file
         if not os.path.exists(self.srcdir):
             os.mkdir(self.srcdir)
 
@@ skipping 72 matching lines @@
 
     def cleanup(self):
         # Allow chrome to be restarted again.
         os.unlink(constants.DISABLE_BROWSER_RESTART_MAGIC_FILE)
         # Reset the UI.
         login.nuke_login_manager()
         login.refresh_login_screen()
         if self.home_dir:
             shutil.rmtree(self.home_dir, ignore_errors=True)
         test.test.cleanup(self)