Implements the dialog view for logout button tray in public sessions.

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 564 matching lines @@
       <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_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_LOGOUT_CONFIRMATION_TITLE" desc="Dialog title for the logout confirmation dialog.">
+        Exiting Session
+      </message>
+      <message name="IDS_ASH_LOGOUT_CONFIRMATION_WARNING" desc="The text for the logout confirmation dialog.">
+        You will automatically be signed out in <ph name="LOGOUT_TIME_LEFT">$1<ex>5 seconds</ex></ph>.
+      </message>
+      <message name="IDS_ASH_LOGOUT_CONFIRMATION_WARNING_NOW" desc="The text for the logout confirmation dialog with no time left.">
+        You will be signed out now.
+      </message>
+      <message name="IDS_ASH_LOGOUT_CONFIRMATION_BUTTON" desc="The text for okay button of the logout confirmation dialog.">
+        Sign out now
+      </message>
+
       <!-- ChromeOS-specific strings -->
       <if expr="pp_ifdef('chromeos')">
         <part file="ash_chromeos_strings.grdp" />
       </if>
 
     </messages>
   </release>
 </grit>