[MD User Menu] New way to handle supervised user auth error

chrome/app/chromium_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 <!-- This file contains definitions of strings that are distribution specific.
 If you update this file, be sure also to update google_chrome_strings.grd. -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       output_all_resource_defines="false" source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/chromium_strings.h" type="rc_header">
       <emit emit_type='prepend'></emit>
     </output>
@@ skipping 1119 matching lines @@
         Chromium is out of date
       </message>
       <message name="IDS_UPGRADE_BUBBLE_TEXT" desc="Text for the upgrade bubble view full description.">
         Chromium could not update itself to the latest version, so you are missing out on awesome new features and security fixes. You need to manually reinstall Chromium.
       </message>
       <message name="IDS_UPGRADE_BUBBLE_REENABLE_TEXT" desc="Text for the upgrade bubble view full description.">
         Chromium could not update itself to the latest version, so you are missing out on awesome new features and security fixes. You need to update Chromium.
       </message>
 
       <!-- User menu errors -->
+      <message name="IDS_SYNC_ERROR_USER_MENU_SUPERVISED_SIGNIN_MESSAGE" desc="Message of the out-of-date signin token error for supervised users in the header of desktop user menu.">
+        Your manager must remove and add you back to Chromium.
+      </message>
       <message name="IDS_SYNC_ERROR_USER_MENU_UPGRADE_MESSAGE" desc="Message of the out-of-date Chrome client error in the header of desktop user menu.">
         Chromium is out of date.
       </message>
       <message name="IDS_SYNC_ERROR_USER_MENU_UPGRADE_BUTTON" desc="Button in the header of desktop user menu that prompts the user to update Chrome to fix the out-of-date Chrome client error.">
         Update Chromium
       </message>
 
       <!-- Upgrade recovery bubble -->
       <message name="IDS_RUN_RECOVERY" desc="Text for the button the user clicks to recover chromium and its updater.">
         Update Chromium
@@ skipping 101 matching lines @@
         </message>
         <message name="IDS_METRO_FLOW_LOGO_STRING_ALT"
                  desc="Alt text for the faded Chrome logo image.">
           Chromium logo
         </message>
       </if>
 
     </messages>
   </release>
 </grit>