Move the keyboard overlay view to ash.

ash/ash_strings.grd

 <?xml version="1.0" encoding="UTF-8"?>
 
 <!--
 This file contains the strings for ash.
 -->
 
 <grit base_dir="." latest_public_release="0" current_release="1"
       source_lang_id="en" enc_check="möl">
   <outputs>
     <output filename="grit/ash_strings.h" type="rc_header">
@@ skipping 182 matching lines @@
       </message>
 
       <message name="IDS_AURA_SET_DESKTOP_WALLPAPER" desc="The label used for change wallpaper in context menu">
         Set wallpaper...
       </message>
 
       <message name="IDS_FRAME_MAXIMIZE_BUTTON_TOOLTIP" desc="Tooltip for the maximize/restore button in window frames in aura">
         Pull down to minimize, left or right to tile
       </message>
 
+      <message name="IDS_ASH_KEYBOARD_OVERLAY_TITLE" desc="The title of the keyboard overlay.">
+        Keyboard Overlay
+      </message>
+
       <!-- Status tray items -->
       <message name="IDS_ASH_STATUS_TRAY_ACCESSIBLE_NAME" desc="The accessible name of the status tray.">
         Status tray
       </message>
       <message name="IDS_ASH_STATUS_TRAY_SETTINGS" desc="The label used for the settings item in the status tray.">
         Settings
       </message>
       <message name="IDS_ASH_STATUS_TRAY_SHUT_DOWN" desc="The label used for the button in the status tray to shut down the system.">
         Shut down
       </message>
@@ skipping 196 matching lines @@
       <message name="IDS_ASH_WEB_NOTFICATION_TRAY_SETTINGS" desc="The menu entry or button for visiting the appropriate settings page.">
         Settings...
       </message>
       <message name="IDS_ASH_WEB_NOTFICATION_TRAY_CLEAR_ALL" desc="The button for clearing all notifications.">
         Clear All
       </message>
     </messages>
   </release>
 </grit>