Install and launch kiosk app from cached crx file at start up.

chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- ChromeOS-specific strings (included from generated_resources.grd).
      Everything in this file is wrapped in <if expr="chromeos">. -->
 <grit-part>
   <message name="IDS_EMPTY_STRING" desc="Empty string, exist only to make code generic. No translation required.">
   </message>
   <message name="IDS_CHROMEBOOK" desc="The localized name for Chromebook.">
     Chromebook
   </message>
   <message name="IDS_CHROMEBOX" desc="The localized name for Chromebox">
@@ skipping 4866 matching lines @@
   </message>
   <message name="IDS_KIOSK_APP_FAILED_TO_LAUNCH" desc="Generic error message used when a kiosk app fails to launch.">
     Darn, the kiosk application could not be launched.
   </message>
   <message name="IDS_KIOSK_APP_ERROR_UNABLE_TO_MOUNT" desc="Error message used when a kiosk app fails to launch due to cryptohome error.">
     Kryptonite! The cryptohome for the kiosk application could not be mounted.
   </message>
   <message name="IDS_KIOSK_APP_ERROR_UNABLE_TO_INSTALL" desc="Error message used when a kiosk app fails to launch due to install failure.">
     Kiosk application could not be installed.
   </message>
+  <message name="IDS_KIOSK_APP_ERROR_UNABLE_TO_DOWNLOAD" desc="Error message used when a kiosk app fails to launch due to crx file download failure.">
+    Kiosk application could not be downloaded.
+  </message>  
+  <message name="IDS_KIOSK_APP_ERROR_UNABLE_TO_LAUNCH" desc="Error message used when a kiosk app fails to launch due to app launching failure.">
+    Kiosk application could not be launched.
+  </message>    
   <message name="IDS_KIOSK_APP_ERROR_USER_CANCEL" desc="Error message used when a kiosk app launch is canceled by user.">
     Kiosk application launch canceled.
   </message>
 
   <!-- About Chrome page -->
   <message name="IDS_UPGRADE_OFFLINE" desc="Status label: Currently offline">
     You are currently offline.
   </message>
   <message name="IDS_UPGRADE_DISALLOWED" desc="Status label: Upgrade disallowed for the current network">
     You are currently connected to the <ph name="NETWORK_TYPE">$1<ex>cellular</ex></ph> network.
@@ skipping 663 matching lines @@
   </message>
 
   <!-- 'OK Google' voice search activation display strings -->
   <message name="IDS_FLAGS_OK_GOOGLE_NAME" desc="Name of about:flags option for Ok Google.">
     Enable 'Ok Google' to activate voice search.
   </message>
   <message name="IDS_FLAGS_OK_GOOGLE_DESCRIPTION" desc="Description of about:flags option Ok Google.">
     If enabled, there will be an option in chrome:settings to enable saying 'Ok Google' to activate voice search.
   </message>
 </grit-part>