Storage manager: Show the disk usage of other users.

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>
   <!-- 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 2596 matching lines @@
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_SUBITEM_LABEL_DOWNLOADS" desc="In storage manager overlay, label for the size of Downloads directory.">
     Downloads
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_SUBITEM_LABEL_DRIVE_CACHE" desc="In storage manager overlay, label for the size of Google Drive's offline files.">
     Offline files
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_SUBITEM_LABEL_BROWSING_DATA" desc="In storage manager overlay, label for the size of browsing data.">
     Browsing data
   </message>
+  <message name="IDS_OPTIONS_SETTINGS_STORAGE_SUBITEM_LABEL_OTHER_USERS" desc="In storage manager overlay, label for the total size of other users' data directories.">
+    Other users
+  </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_SUBITEM_LABEL_ARC" desc="In storage manager overlay, label for the total size size of Android apps and cache.">
     Android storage
   </message>
   <message name="IDS_OPTIONS_SETTINGS_STORAGE_DELETE_ALL_BUTTON_TITLE" desc="In storage manager overlay, label for the total size size of Android apps and cache.">
     Delete all
   </message>
   <message name="IDS_OPTIONS_ACCOUNTS_ALLOW_BWSI_DESCRIPTION" desc="In the Accounts settings tab, the text on the checkbox to allow browse without signing in.">
     Enable Guest browsing
   </message>
   <message name="IDS_OPTIONS_ACCOUNTS_ENABLE_SUPERVISED_USERS" desc="In the Users settings dialog, the text on the checkbox to allow creation and sign-in of supervised users.">
@@ skipping 4129 matching lines @@
   <message name="IDS_CRITICALLY_LOW_DISK_NOTIFICATION_TITLE" desc="Title of the notification warning users that they are critically low on disk space.">
     Device disk space critically low
   </message>
   <message name="IDS_CRITICALLY_LOW_DISK_NOTIFICATION_MESSAGE" desc="Notification text warning users that they are critically low on disk space.">
     Free up disk space or device will become unresponsive.
   </message>
   <message name="IDS_LOW_DISK_NOTIFICATION_BUTTON" desc="Button on the low disk notification to open storage management.">
     Manage storage
   </message>
 </grit-part>