Change some kiosk offline update strings.

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 5094 matching lines @@
   <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>
   <message name="IDS_KIOSK_EXTERNAL_UPDATE_IN_PROGRESS" desc="Message shown on screen when the system is updating kiosk apps from usb stick.">
-    Kiosk applications are being updated from usb stick, please wait. Do not remove the usb stick.
+    Please wait....Kiosk app is in the process of being updated. Do not remove the USB stick.
   </message>
   <message name="IDS_KIOSK_EXTERNAL_UPDATE_NO_UPDATES" desc="Error message for no external extensions to update.">
-    No kiosk apps with newer version are found on the usb stick, nothing to update. Please remove the usb stick.
+    No Kiosk apps with newer version found. Nothing to update. Please remove the USB stick.
   </message>
   <message name="IDS_KIOSK_EXTERNAL_UPDATE_INVALID_MANIFEST" desc="Error message for invalid external update manifest file from usb stick.">
-    Found invalid kiosk external update manifest file on the usb stick, failed to update kiosk apps. Please remove the usb stick.
+    Invalid Kiosk external update manifest file found. Failed to update Kiosk app. Please remove the USB stick.
   </message>
   <message name="IDS_KIOSK_EXTERNAL_UPDATE_COMPLETE" desc="Message shown on screen when the system completes updating kiosk apps from usb stick.">
-    Kiosk app updating from usb stick is completed. Please remove the usb stick from the device.
+    Kiosk app has been updated. Please remove the USB stick.
   </message>
   <message name="IDS_KIOSK_EXTERNAL_UPDATE_SUCCESSFUL_UPDATED_APPS" desc="Message shown for successfully updated kiosk apps.">
-    The following kiosk apps have been updated, please reboot the device to complete the update process: <ph name="updated_apps">$1<ex>PrintApp</ex></ph>.
+    The following kiosk apps "<ph name="updated_apps">$1<ex>PrintApp</ex></ph>" have been updated. Please reboot the device to complete the update process.
   </message>
   <message name="IDS_KIOSK_EXTERNAL_UPDATE_FAILED_UPDATED_APPS" desc="Message shown for failed updated kiosk apps.">
     The following kiosk apps have been failed for updating:
   </message>
   <message name="IDS_KIOSK_EXTERNAL_UPDATE_BAD_CRX" desc="Error message for crx file unpacking failure.">
     Bad crx file, unpacking failed.
   </message>
   <message name="IDS_KIOSK_EXTERNAL_UPDATE_SAME_OR_LOWER_APP_VERSION" desc="Error message for external extension is the same or lower version comparing to the existing one.">
     External extension is at the same or lower version comparing to the existing one.
   </message>
@@ skipping 813 matching lines @@
   <message name="IDS_SET_TIME_BUTTON_CLOSE" desc="Text for the button to close the window.">
     Done
   </message>
   <message name="IDS_SET_TIME_DATE_LABEL" desc="Label for the date input element.">
     System date
   </message>
   <message name="IDS_SET_TIME_TIME_LABEL" desc="Label for the time input element.">
     System time
   </message>
 </grit-part>