[cros] check for updates in WebUI OOBE can be cancelled in dev builds.

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 10776 matching lines @@
       </message>
       <message name="IDS_UPDATE_COMPLETED" desc="Notification for update completed">
         System update complete. Please restart the system.
       </message>
       <message name="IDS_INSTALLING_UPDATE" desc="Label shown on the updates installation screen during OOBE">
         Please wait while <ph name="PRODUCT_NAME">$1<ex>Chrome OS</ex></ph> installs the latest system updates.
       </message>
       <message name="IDS_INSTALLING_UPDATE_DESC" desc="Additional info shown on the updates installation screen during OOBE">
         Your computer will restart when the update is complete.
       </message>
+      <message name="IDS_UPDATE_CANCEL" desc="Message telling to press Escape to cancel update on a non-official build">
+        Press ESCAPE to skip (Non-official builds only).
+      </message>
+      <message name="IDS_UPDATE_CANCELLED" desc="Message shown when the update has been cancelled by user">
+        Cancelling update...
+      </message>
       <message name="IDS_WELCOME_SCREEN_TITLE" desc="Title of the OOBE welcome screen">
         Connect
       </message>
       <message name="IDS_EULA_SCREEN_TITLE" desc="Title of the OOBE EULA screen">
         The small print
       </message>
       <message name="IDS_UPDATE_SCREEN_TITLE" desc="Title of the OOBE update screen">
         Update
       </message>
       <message name="IDS_SIGNIN_SCREEN_TITLE" desc="Title of OOBE/Add User sign in screen">
@@ skipping 2716 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>