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chrome/app/chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- Chrome OS-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>
   <!-- Idle logout dialog for retail mode -->
   <message name="IDS_IDLE_LOGOUT_TITLE" desc="Dialog title for the idle logout dialog. Used in retail mode only.">
     Are you still there?
   </message>
@@ skipping 567 matching lines @@
   </message>
   <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_TOOLTIP_IMPORTING" desc="Cloud import active-backup tooltip.">
     Backing up <ph name="FILE_COUNT">$1<ex>5</ex></ph> photos
   </message>
   <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_STATUS_DONE" desc="Cloud import backup is complete status.">
     <ph name="FILE_COUNT">$1<ex>5</ex></ph> photos backed up to <ph name="BEGIN_LINK">&lt;span class='destination-link'&gt;</ph>Google Drive<ph name="END_LINK">&lt;/span&gt;</ph>
   </message>
   <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_TOOLTIP_DONE" desc="Cloud import backup is complete tooltip.">
     <ph name="FILE_COUNT">$1<ex>5</ex></ph> photos backed up
   </message>
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_STATUS_PREPARING" desc="File Manager status message. Shown while the scan of files to determine which files should actually be transferred is in progress.">
+    Preparing to backup...
+  </message>
   <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_ITEMS_REMAINING" desc="File Manager status message.">
     Importing <ph name="FILE_COUNT">$1<ex>5</ex></ph> files...
   </message>
   <message name="IDS_FILE_BROWSER_COPY_FILE_NAME" desc="File Manager status message.">
     Copying <ph name="FILE_NAME">$1<ex>movie.avi</ex></ph>...
   </message>
   <message name="IDS_FILE_BROWSER_COPY_ITEMS_REMAINING" desc="File Manager status message. 'Item' is used here as a generic term for file or directory.">
     Copying $1 items...
   </message>
   <message name="IDS_FILE_BROWSER_COPY_TARGET_EXISTS_ERROR" desc="File Manager error message. 'Item' is used here as a generic term for file or directory.">
@@ skipping 6022 matching lines @@
     Attempts left: $1
   </message>
   <message name="IDS_REQUEST_PIN_DIALOG_PIN" desc="The Provider Identification Number abbreviation">
     PIN
   </message>
   <message name="IDS_REQUEST_PIN_DIALOG_PUK" desc="The Personal Unlocking Key (as used in mobile phones) abbreviation">
     PUK
   </message>
 
 </grit-part>