[Chromoting] Make virtual Me2Me explicitly ask for an app-specific password.

remoting/tools/me2me_virtual_host.py

 #!/usr/bin/env python
 # 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.
 
 # Virtual Me2Me implementation.  This script runs and manages the processes
 # required for a Virtual Me2Me desktop, which are: X server, X desktop
 # session, and Host process.
 # This script is intended to run continuously as a background daemon
 # process, running under an ordinary (non-root) user account.
@@ skipping 75 matching lines @@
 
   def generate_tokens(self):
     """Prompt for username/password and use them to generate new authentication
     tokens.
 
     Raises:
       Exception: Failed to get new authentication tokens.
     """
     print "Email:",
     self.login = raw_input()
-    password = getpass.getpass("Password: ")
+    password = getpass.getpass("App-specific password: ")
 
     chromoting_auth = gaia_auth.GaiaAuthenticator('chromoting')
     self.chromoting_auth_token = chromoting_auth.authenticate(self.login,
                                                               password)
 
     xmpp_authenticator = gaia_auth.GaiaAuthenticator('chromiumsync')
     self.xmpp_auth_token = xmpp_authenticator.authenticate(self.login,
                                                            password)
 
   def load_config(self):
@@ skipping 740 matching lines @@
         os.remove(host.config_file)
         return 0
       elif os.WEXITSTATUS(status) == 4:
         logging.info("OAuth credentials are invalid - exiting.")
         os.remove(auth.config_file)
         return 0
 
 if __name__ == "__main__":
   logging.basicConfig(level=logging.DEBUG)
   sys.exit(main())