Update import details panel to comply (mostly) with UX direction.

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 430 matching lines @@
   </message>
   <message name="IDS_FILE_BROWSER_REMOVE_FOLDER_SHORTCUT_BUTTON_LABEL" desc="Menu item label, unpinning the selected folder from the left nav.">
     Remove shortcut
   </message>
   <message name="IDS_FILE_BROWSER_SHARE_BUTTON_LABEL" desc="Menu item label, showing dialog to share the selected file.">
     Share
   </message>
   <message name="IDS_FILE_BROWSER_CANCEL_SELECTION_BUTTON_LABEL" desc="Label for button that unselects all selected items.">
     Cancel selection
   </message>
-  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_BUTTON_LABEL" desc="Label for button that initiates media backup to the cloud.">
-    Import <ph name="FILE_COUNT">$1<ex>5</ex></ph> files to Google Drive
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_TITLE" desc="Title of the cloud import feature.">
+    Cloud backup
   </message>
-  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_ACTIVE_IMPORT_BUTTON_LABEL" desc="Message to user that there is an active import in progress.">
-    Importing...
+  <message name="IDS_FILE_BROWSER_CLOUD_DESTINATION_FOLDER" desc="Title of the cloud import destination folder.">
+    Chrome OS Cloud backup
   </message>
-  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_EMPTY_SCAN_BUTTON_LABEL" desc="Message to user that no new files were found, so cloud import is not possible.">
-    No new media
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_DESCRIPTION" desc="Short description of the cloud import feature.">
+    Back up your media device’s photos and videos to Google Drive.
   </message>
-  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_INSUFFICIENT_SPACE_BUTTON_LABEL" desc="Message to user that there is not enough space to perform a cloud import.">
-    Insufficient space on your device!
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_START" desc="Tooltip of the toolbar button that starts backup.">
+    Backup your photos and videos
   </message>
-  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_SCANNING_BUTTON_LABEL" desc="Label for button showing that scanning is in progress...prior to being enabled when scanning is complete.">
-    Scanning your media...
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_SHOW_DETAILS" desc="Tooltip for button that shows details panel.">
+    Show Cloud backup details
   </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 name="IDS_FILE_BROWSER_CLOUD_IMPORT_COMMAND" desc="Label of button on details panel that invokes cloud import feature.">
+    Back up
   </message>
-
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_STATUS_SCANNING" desc="Cloud import scanning status message.">
+    Scanning your media device...
+    <ph name="FILE_COUNT">$1<ex>5</ex></ph> new photos found
+  </message>
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_TOOLTIP_SCANNING" desc="Cloud import scanning tooltip.">
+    Scanning your media device...
+  </message>
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_STATUS_NO_MEDIA" desc="Cloud import no-new-media-found status message. Shown after backup is completed and when a search for new files to backup produces no result.">
+    All backed up!
+  </message>
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_TOOLTIP_NO_MEDIA" desc="Cloud import no-new-media-found tooltip. Shown after backup is completed and when a search for new files to backup produces no result.">
+    All backed up!
+  </message>
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_STATUS_INSUFFICIENT_SPACE" desc="Cloud import insufficient space status message.">
+    <ph name="FILE_COUNT">$1<ex>5</ex></ph> new photos found
+    &lt;br&gt;
+    Not enough space on device.
+    &lt;br&gt;
+    Try selecting a few photos to start.
+  </message>
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_TOOLTIP_INSUFFICIENT_SPACE" desc="Cloud import insufficient space tooltip.">
+    Not enough space on device
+  </message>
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_STATUS_READY" desc="Cloud import ready status message.">
+    <ph name="FILE_COUNT">$1<ex>5</ex></ph> new photos found
+    &lt;br&gt;
+    Ready to backup 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_READY" desc="Cloud import ready tooltip.">
+    Ready to backup <ph name="FILE_COUNT">$1<ex>5</ex></ph> new photos
+  </message>
+  <message name="IDS_FILE_BROWSER_CLOUD_IMPORT_STATUS_IMPORTING" desc="Cloud import active-backup status. Message shown when importing is in progress">
+    Backing up <ph name="FILE_COUNT">$1<ex>5</ex></ph> photos 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_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_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.">
     Whoops, <ph name="FILE_NAME">$1<ex>movie.avi</ex></ph> already exists. Rename it and try again.
   </message>
   <message name="IDS_FILE_BROWSER_COPY_SOURCE_NOT_FOUND_ERROR" desc="File Manager error message. 'Item' is used here as a generic term for file or directory.">
@@ skipping 5564 matching lines @@
   <message name="IDS_FLAGS_DISABLE_RESOLVE_TIMEZONE_BY_GEOLOCATION_NAME" desc="Title for the flag to disable automatic timezone update on user location change.">
     Disable automatic timezone update by geolocation
   </message>
   <message name="IDS_FLAGS_DISABLE_RESOLVE_TIMEZONE_BY_GEOLOCATION_DESCRIPTION" desc="Description for the flag to disable user setting to automatically update timezone by user geolocation.">
     If set, automatic timezone update by the current geolocation is turned off.
   </message>
   <message name="IDS_OPTIONS_RESOLVE_TIMEZONE_BY_GEOLOCATION_DESCRIPTION" desc="Label for checkbox to allow automatic timezone update by user geolocation.">
     Automatically resolve timezone by geolocation
   </message>
 </grit-part>