Shutdown button tooltip string changed for consistency.

ash/ash_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains the strings for ash.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/ash_strings.h" type="rc_header">
@@ skipping 486 matching lines @@
       <message name="IDS_ASH_STATUS_TRAY_BATTERY_CHARGING_UNRELIABLE_ACCESSIBLE" desc="The message used by accessibility to indicate that battery charging is unreliable.">
         Plugged in to a low-power charger. Battery charging may not be reliable.
       </message>
       <message name="IDS_ASH_STATUS_TRAY_HELP" desc="The accessible text for the help button.">
         Help
       </message>
       <message name="IDS_ASH_STATUS_TRAY_DATE" desc="The date displayed on ash system bubble, Depending on launguage, please choose the best separator(eg ',') between abbreviated weekday and date">
         <ph name="short_weekday">$1<ex>Fri</ex></ph>, <ph name="date">$2<ex>Aug 31, 2012</ex></ph>
       </message>
       <message name="IDS_ASH_STATUS_TRAY_SHUTDOWN" desc="The accessible text for the shutdown button.">
-        Shutdown
+        Shut down
       </message>
       <message name="IDS_ASH_STATUS_TRAY_REMAINING_SESSION_TIME" desc="The time remaining until the end of the session. Shown if the session length is limited.">
         <ph name="hours">$1<ex>01</ex></ph>:<ph name="minutes">$2<ex>35</ex></ph>:<ph name="seconds">$3<ex>12</ex></ph>
       </message>
       <message name="IDS_ASH_STATUS_TRAY_REMAINING_SESSION_TIME_NOTIFICATION" desc="Notification shown to inform the user that the session length is limited.">
         This session will end in <ph name="session_time_remaining">$1<ex>15 minutes</ex></ph>. You will be automatically signed out.
       </message>
 
       <message name="IDS_ASH_STATUS_TRAY_LOCALLY_MANAGED_LABEL" desc="Label shown instead of email for supervised users">
          Supervised user
@@ skipping 98 matching lines @@
 
       <!-- ChromeOS-specific strings -->
       <if expr="pp_ifdef('chromeos')">
         <part file="ash_chromeos_strings.grdp" />
       </if>
 
     </messages>
   </release>
 </grit>