If force-sign-in policy is enabled, popup warning dialog before window closing if auth token becom…

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 739 matching lines @@
           Link your Chromium data to this account?
         </message>
         <message name="IDS_ENTERPRISE_SIGNIN_EXPLANATION_WITHOUT_PROFILE_CREATION" desc="The warning message displayed to an enterprise user about to link their profile to their Google account. This message is followed by a 'Learn more' link.">
           You are signing in with a managed account and giving its administrator control over your Chromium profile. Your Chromium data, such as your apps, bookmarks, history, passwords, and other settings will become permanently tied to <ph name="USER_NAME">$1<ex>pat@example.com</ex></ph>. You will be able to delete this data via the Google Accounts Dashboard, but you will not be able to associate this data with another account. <ph name="LEARN_MORE">$2<ex>Learn more</ex></ph>
         </message>
         <message name="IDS_ENTERPRISE_SIGNIN_EXPLANATION_WITH_PROFILE_CREATION" desc="The warning message displayed to an enterprise user about to link their profile to their Google account. Additionally notifies the user that they can create a new profile instead. This message is followed by a 'Learn more' link.">
           You are signing in with a managed account and giving its administrator control over your Chromium profile. Your Chromium data, such as your apps, bookmarks, history, passwords, and other settings will become permanently tied to <ph name="USER_NAME">$1<ex>pat@example.com</ex></ph>. You will be able to delete this data via the Google Accounts Dashboard, but you will not be able to associate this data with another account. You can optionally create a new profile to keep your existing Chromium data separate. <ph name="LEARN_MORE">$2<ex>Learn more</ex></ph>
         </message>
       </if>
 
+      <if expr="toolkit_views">
+        <message name="IDS_ENTERPRISE_FORCE_SIGNOUT_CLOSE_CONFIRM" desc="Text of the button to confirm close all browser windows">
+          Close all Chromium windows and sign in now
+        </message>
+        <message name="IDS_ENTERPRISE_FORCE_SIGNOUT_EXPLANATION" desc="Text of the reason to sign out">
+          Authentication certificate failed. Please sign in to Chromium again as <ph name="USER_NAME">$2<ex>pat@example.com</ex></ph> or contact your administrator for more information. <ph name="ADDITIONAL_EXPLANATION">$3</ph>
+        </message>
+        <message name="IDS_ENTERPRISE_FORCE_SIGNOUT_EXPLANATION_WITHOUT_USER_NAME" desc="Text of the reason to sign out when there is no valid email address">
+          Authentication certificate failed. Please sign in to Chromium again or contact your administrator for more information. <ph name="ADDITIONAL_EXPLANATION">$2</ph>
+        </message>
+      </if>
+
       <!-- Signin Email Confirmation tab modal dialog -->
       <if expr="not chromeos">
         <message name="IDS_SIGNIN_EMAIL_CONFIRMATION_TITLE" desc="Title of the signin email confirmation tab modal dialog.">
           <ph name="USER_EMAIL_ADDRESS">$1<ex>foo@gmail.com</ex></ph> was previously using Chromium
         </message>
       </if>
 
       <!-- SRT bubble messages -->
       <if expr="is_win">
         <message name="IDS_SRT_BUBBLE_TITLE" desc="Text for the title of the software removal tool bubble view.">
@@ skipping 486 matching lines @@
         <message name="IDS_WIN10_WELCOME_PIN_SUBHEADING" desc="A subheading on a section which gives instructions on how to pin Chromium to the Windows 10 taskbar.">
           Pin Chromium to your taskbar
         </message>
         <message name="IDS_WIN10_WELCOME_SELECT" desc="An instruction asking the user to select Chromium from an external list of apps.">
           Select <ph name="SMALL_PRODUCT_LOGO">&lt;div class="logo-small"&gt;&lt;/div&gt;</ph> <ph name="BEGIN_BOLD">&lt;strong&gt;</ph>Chromium<ph name="END_BOLD">&lt;/strong&gt;</ph>
         </message>
       </if>
     </messages>
   </release>
 </grit>