Add an environment variable to Virtual Me2Me session.

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 269 matching lines @@
     self.x_proc = subprocess.Popen(["Xvfb", ":%d" % display,
                                     "-auth", X_AUTH_FILE,
                                     "-nolisten", "tcp",
                                     "-screen", "0", screen_option
                                     ] + extra_x_args)
     if not self.x_proc.pid:
       raise Exception("Could not start Xvfb.")
 
     # Create clean environment for new session, so it is cleanly separated from
     # the user's console X session.
-    self.child_env = {"DISPLAY": ":%d" % display}
+    self.child_env = {
+        "DISPLAY": ":%d" % display,
+        "REMOTING_ME2ME_SESSION": "1" }
     for key in [
         "HOME",
         "LOGNAME",
         "PATH",
         "SHELL",
         "USER",
         "USERNAME"]:
       if os.environ.has_key(key):
         self.child_env[key] = os.environ[key]
 
@@ skipping 404 matching lines @@
         logging.info("Host ID has been deleted - exiting.")
         # Host config is no longer valid.  Delete it, so the next time this
         # script is run, a new Host ID will be created and registered.
         os.remove(host.config_file)
         return 0
 
 
 if __name__ == "__main__":
   logging.basicConfig(level=logging.DEBUG)
   sys.exit(main())