Ash:Strings - Update quit message to sign out on chrome-os

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 563 matching lines @@
       </message>
       <message name="IDS_ASH_SCREENSHOT_NOTIFICATION_TEXT_SUCCESS" desc="The text of the notification when a screenshot was taken.">
         Click to view
       </message>
       <message name="IDS_ASH_SCREENSHOT_NOTIFICATION_TEXT_DISABLED" desc="The text of the notification when taking a screenshot failed because screenshots are disabled by administrator policy.">
         The ability to take screenshots has been disabled by your administrator.
       </message>
       <message name="IDS_ASH_SCREENSHOT_NOTIFICATION_TEXT_FAIL" desc="The text of the notification when taking a screenshot failed.">
         Failed to save screenshot
       </message>
+      <message name="IDS_ASH_SIGN_OUT_WARNING_POPUP_TEXT" desc="The text of the popup when the user preses the exit shortcut in chrome-os.">
+        Press Ctrl+Shift+Q twice to sign out.
+      </message>
+      <message name="IDS_ASH_SIGN_OUT_WARNING_POPUP_TEXT_ACCESSIBLE" desc="The message used by accessibility to indicate the content of the popup when the user preses the exit shortcut in chrome-os.">
+        Press Control Shift Q twice to sign out.
+      </message>
       <message name="IDS_ASH_EXIT_WARNING_POPUP_TEXT" desc="The text of the popup when the user preses the exit shortcut.">
         Press Ctrl+Shift+Q twice to quit.
       </message>
       <message name="IDS_ASH_EXIT_WARNING_POPUP_TEXT_ACCESSIBLE" desc="The message used by accessibility to indicate the content of the popup when the user preses the exit shortcut.">
         Press Control Shift Q twice to quit.
       </message>
 
       <message name="IDS_ASH_IME_INFOLIST_WINDOW_TITLE" desc="The title of the infolist window where the meanings and the usages of words are displayed.">
         Information
       </message>
@@ skipping 48 matching lines @@
 
       <!-- ChromeOS-specific strings -->
       <if expr="chromeos">
         <part file="ash_chromeos_strings.grdp" />
       </if>
 
     </messages>
   </release>
 </grit>