When critical updates have been installed and the user has been idle for quite some time, show a ...

chrome/app/generated_resources.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains definitions of resources that will be translated for each
 locale.  The variables is_win, is_macosx, is_linux, and is_posix are available
 for making strings OS specific.  Other platform defines such as use_titlecase
 are declared in build/common.gypi.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
@@ skipping 7164 matching lines @@
       <message name="IDS_PAGE_INFO_SECURITY_TAB_FALLBACK_MESSAGE" desc="This message is displayed when the first secure connection to a site failed and Chrome retried with an older protocol.">
         The connection had to be retried using SSL 3.0. This typically means that the server is using very old software and may have other security issues.
       </message>
       <message name="IDS_PAGE_INFO_SECURITY_TAB_RENEGOTIATION_MESSAGE" desc="This message is displayed when the server hasn't been updated to fix a recent security issues. TLS here is an acronym and need not be translated. 'renegotiation' is a technical term describing a process of agreeing on a new set of security parameters and secrets. 'extension' here should be taken to mean 'amendment' rather than elongation.">
         The server does not support the TLS renegotiation extension.
       </message>
       <message name="IDS_PAGE_INFO_SITE_INFO_TITLE" desc="The name of the site information section.">
         Site information
       </message>
 
+      <!-- Critical Notification Bubble -->
+      <message name="IDS_CRITICAL_NOTIFICATION_HEADLINE" desc="The headline for the critical notification">
+        <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> will restart in <ph name="SECONDS">$2<ex>10</ex></ph> seconds.
+      </message>
+      <message name="IDS_CRITICAL_NOTIFICATION_TEXT" desc="The text of the critical update notification">
+        A special security update for <ph name="PRODUCT_NAME">$1<ex>Google Chrome</ex></ph> was just applied; you should restart now for it to take effect (we'll restore your tabs).
+      </message>
+      <message name="IDS_CRITICAL_NOTIFICATION_RESTART" desc="The restart button label">
+        OK - Restart now
+      </message>
+      <message name="IDS_CRITICAL_NOTIFICATION_DISMISS" desc="The dismiss button label">
+        Don't restart
+      </message>
+
       <!-- SSL Blocking Page -->
       <message name="IDS_SSL_BLOCKING_PAGE_TITLE" desc="The title of the SSL blocking page.">
         SSL Error
       </message>
       <message name="IDS_SSL_BLOCKING_PAGE_PROCEED" desc="Proceed button text of the SSL blocking page.">
         Proceed anyway
       </message>
       <message name="IDS_SSL_BLOCKING_PAGE_EXIT" desc="'Back' button text of the SSL blocking page.">
         Back to safety
       </message>
@@ skipping 6779 matching lines @@
     </messages>
     <structures fallback_to_english="true">
       <!-- Make sure these stay in sync with the structures in generated_resources.grd. -->
       <structure name="IDD_CHROME_FRAME_FIND_DIALOG" file="cf_resources.rc" type="dialog" >
       </structure>
       <structure name="IDD_CHROME_FRAME_READY_PROMPT" file="cf_resources.rc" type="dialog" >
       </structure>
     </structures>
   </release>
 </grit>