Add ability to customise Virtual Me2Me X session.

remoting/tools/me2me_virtual_host.py

Index: remoting/tools/me2me_virtual_host.py
diff --git a/remoting/tools/me2me_virtual_host.py b/remoting/tools/me2me_virtual_host.py
index 34092427764d4333720328767670ea7bb15dad41..cde6cd96b9c9eb2c20efbf86bde0612d984327b2 100755
--- a/remoting/tools/me2me_virtual_host.py
+++ b/remoting/tools/me2me_virtual_host.py
@@ -487,6 +487,18 @@ def choose_x_session():
   if XSESSION_COMMAND is not None:
     return XSESSION_COMMAND
 
+  # Use a custom startup file if present
+  startup_file = os.path.expanduser("~/.me2me_session")

[Sergey Ulanov, 2012/07/31 21:09:41]

maybe call it .crd_session or .chrome_remoting_session? Me2Me is just a
codename, we shouldn't use it for user-facing features.

[Lambros, 2012/08/01 23:46:17]

I've changed it to ~/.chrome-remote-desktop-session, which is a bit of a
fistful, but it seems the most logical name (bearing in mind that the config
directory is called chrome-remote-desktop).

+  if os.path.exists(startup_file):
+    # Use the same logic that a Debian system typically uses with ~/.xsession
+    # (see /etc/X11/Xsession.d/50x11-common_determine-startup), to determine
+    # exactly how to run this file.
+    if os.access(startup_file, os.X_OK):
+      return startup_file
+    else:
+      shell = os.environ.get("SHELL", "sh")

[Jamie, 2012/07/31 21:08:06]

Optional: test for undefined SHELL variable?

+      return [shell, startup_file]
+
   # Unity-2d would normally be the preferred choice on Ubuntu 12.04.  At the
   # time of writing, this session does not work properly (missing launcher and
   # panel), so gnome-session-fallback is used in preference.