Move site_backchannel and site_tpm module into client/cros dir.

client/site_tests/network_3GFailedConnect/network_3GFailedConnect.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.
 
-from autotest_lib.client.bin import site_backchannel, test, utils
+from autotest_lib.client.bin import test, utils
+from autotest_lib.client.cros import backchannel
 from autotest_lib.client.common_lib import error
 
 import logging, time
 import dbus, dbus.mainloop.glib, gobject
 
 from autotest_lib.client.cros import flimflam_test_path
 import flimflam, mm
 
 
 class network_3GFailedConnect(test.test):
@@ skipping 46 matching lines @@
         bus_loop = dbus.mainloop.glib.DBusGMainLoop(set_as_default=True)
         self.bus = dbus.SystemBus(mainloop=bus_loop)
 
         # Get to a good starting state
         self.ResetAllModems()
 
         for ii in xrange(connect_count):
             self.ConnectTo3GNetwork(config_timeout=15)
 
     def run_once(self, connect_count=4):
-        site_backchannel.setup()
+        backchannel.setup()
         self.flim = flimflam.FlimFlam()
         self.device_manager = flimflam.DeviceManager(self.flim)
         try:
             self.device_manager.ShutdownAllExcept('cellular')
             self.run_once_internal(connect_count)
         finally:
             try:
                 self.device_manager.RestoreDevices()
             finally:
-                site_backchannel.teardown()
+                backchannel.teardown()