add ScreenSaverUnlock autotest and teach ScreenSaverRunning to log in

client/site_tests/desktopui_ScreenSaverRunning/desktopui_ScreenSaverRunning.py

Index: client/site_tests/desktopui_ScreenSaverRunning/desktopui_ScreenSaverRunning.py
diff --git a/client/site_tests/desktopui_ScreenSaverRunning/desktopui_ScreenSaverRunning.py b/client/site_tests/desktopui_ScreenSaverRunning/desktopui_ScreenSaverRunning.py
deleted file mode 100644
index 7434e2bcefeb96602eed60928e42b35065794282..0000000000000000000000000000000000000000
--- a/client/site_tests/desktopui_ScreenSaverRunning/desktopui_ScreenSaverRunning.py
+++ /dev/null
@@ -1,20 +0,0 @@
-# Copyright (c) 2009 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, utils
-from autotest_lib.client.bin import test
-from autotest_lib.client.common_lib import error
-
-class desktopui_ScreenSaverRunning(test.test):
-    version = 1
-
-    def run_once(self):
-        # check if the screensaver process is running and alive
-        usr = 'chronos'
-        cmd = 'export DISPLAY=:0.0 && xscreensaver-command -version'
-        try:
-            utils.system('su %s -c \'%s\'' % (usr, cmd))
-        except error.CmdError, e:
-            logging.debug(e)
-            raise error.TestFail('xscreensaver is not alive')