Move post-stop script for ibus daemons from ibus.conf to ui.conf.

ui.conf

 # 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.
 
 description   "Chrome OS user interface"
 author        "chromium-os-dev@googlegroups.com"
 
 start on stopping startup
 stop on starting halt or starting reboot
 
@@ skipping 60 matching lines @@
 exec /sbin/session_manager_setup.sh >"${UI_LOG_FILE}" 2>&1
 end script
 
 post-stop script
 
 set +e
 . /sbin/killers
 
 # Terminate any processes with files open on the mount point
 kill_with_open_files_on /home/chronos/user
-term_process "^X$"
+
+# Ensure X, candidate_window for input methods, ibus-daemon, and sub processes
+# of ibus-daemon are terminated. Note that candidate_window and IBus processes
+# are not mananged by Upstart. They are launched from Chrome. ".*" is used
+# since the process name used for matching is limited to 15 characters.
+term_process "(^X$|candidate_w.*|ibus-.*)"
+
+# Remove ibus-daemon's PID file.
+rm -f /home/chronos/.config/ibus/bus/*
 
 # Eventually, this will take a parameter specifying which user's dir to unmount.
 /usr/sbin/cryptohome --action=unmount
 
 end script