Log time between network drops -- from online to offline.

src/platform/acpi/action_lid.sh

 #!/bin/sh
 
 # 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.
 
-# Shutdown instead of sleeping if no one is logged in
+# Shutdowns instead of sleeping if no one is logged in.
 if ! test -f /var/run/state/logged-in; then
   shutdown -h now
   exit 0
 fi
 
-# Check whether the lid is closed before proceeding
+# Checks whether the lid is closed before proceeding.
 grep -q open /proc/acpi/button/lid/*/state
 if [ $? = 0 ]; then
   exit 0
 fi
 
 # On lid close:
-# - lock the screen
+# - locks the screen
 export HOME=/home/chronos
 /usr/bin/xscreensaver-command -l
 
-# - sleep for a bit to give the window manager time to draw the xscreensaver
+# - announces the event
+/usr/bin/dbus-send --type=signal --system / \
+  org.chromium.Power.Manager.PowerStateChanged string:mem
+
+# - sleeps for a bit to give the window manager time to draw the xscreensaver
 #   window to the screen -- see http://crosbug.com/2250.
 # TODO: Remove this hack once we have a better solution in place that adds
 # some coordination between the screen locker and the window manager.
 sleep 0.5
 
-# - suspend the cryptohome device
+# - suspends the cryptohome device
 #CRYPTOHOME=/dev/mapper/cryptohome
 #/usr/bin/test -b $CRYPTOHOME && /sbin/dmsetup suspend $CRYPTOHOME
 
-# - suspend to ram
+# - suspends to ram
 echo -n mem > /sys/power/state
 
 # On lid open:
 # - has it such that you don't have to press a key to display lock screen
 /usr/bin/xscreensaver-command -deactivate
 
-# - resume cryptohome device
+# - announces the event
+/usr/bin/dbus-send --type=signal --system / \
+  org.chromium.Power.Manager.PowerStateChanged string:on
+
+# - resumes cryptohome device
 #/usr/bin/test -b $CRYPTOHOME && /sbin/dmsetup resume $CRYPTOHOME