cros: Add flag that allows user to enable stylus tools.

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 5748 matching lines @@
   <message name="IDS_EOL_DISMISS_BUTTON" desc="A button label shown in the notification for eol status change to dismiss the notification.">
     Don't remind me again
   </message>
   <message name="IDS_FLAGS_EOL_NOTIFICATION_NAME" desc="Name of the about:flag option to disable eol notification.">
     Disable Device End of Life notification.
   </message>
   <message name="IDS_FLAGS_EOL_NOTIFICATION_DESCRIPTION" desc="Description of the about:flag option to disable eol notification.">
     Disable Notifcation when Device is End of Life.
   </message>
 
+  <!-- Stylus strings -->
+  <message name="IDS_FLAGS_FORCE_ENABLE_STYLUS_TOOLS_NAME" desc="Name of the about:flag option to enable stylus tools.">
+    Force enable stylus features
+  </message>
+  <message name="IDS_FLAGS_FORCE_ENABLE_STYLUS_TOOLS_DESCRIPTION" desc="Description of the about:flag option to enable stylus tools.">
+    Forces display of the stylus tools menu in the shelf and the stylus section in settings, even if there is no attached stylus device.
+  </message>
+
   <!-- Genius App -->
   <message name="IDS_GENIUS_APP_NAME" desc="Name of the genius app in the app shelf">
     Get Help
   </message>
   <message name="IDS_GENIUS_APP_DESCRIPTION" desc="Description of the genius app in the app shelf">
     Get help with your <ph name="DEVICE_TYPE">$1<ex>Chromebook</ex></ph>.
   </message>
   <message name="IDS_FILEMANAGER_APP_NAME" desc="Name for the File Manager app.">
     Files
   </message>
@@ skipping 930 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>