Show overlay displaying the state of all sticky keys when it is enabled.

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 580 matching lines @@
       </message>
       <message name="IDS_ASH_LOGOUT_CONFIRMATION_WARNING" desc="The text for the logout confirmation dialog.">
         You will automatically be signed out in <ph name="LOGOUT_TIME_LEFT">$1<ex>5 seconds</ex></ph>.
       </message>
       <message name="IDS_ASH_LOGOUT_CONFIRMATION_WARNING_NOW" desc="The text for the logout confirmation dialog with no time left.">
         You will be signed out now.
       </message>
       <message name="IDS_ASH_LOGOUT_CONFIRMATION_BUTTON" desc="The text for okay button of the logout confirmation dialog.">
         Sign out now
       </message>
+      <message name="IDS_ASH_STICKY_KEY_CONTROL" desc="Name of [Ctrl] key name used for sticky keys. Shouldn't be translated in many languages actually.">

[James Cook, 2014/01/15 22:53:53]

These could probably have more generic names like IDS_ASH_CONTROL_KEY so other
features would be OK with using them.  You might also want to explicitly say
they should be lower-case.

[Tim Song, 2014/01/16 00:01:59]

Done.

+        ctrl
+      </message>
+      <message name="IDS_ASH_STICKY_KEY_SHIFT" desc="Name of [Shift] key name used for sticky keys. Shouldn't be translated in many languages actually.">
+        shift
+      </message>
+      <message name="IDS_ASH_STICKY_KEY_ALT" desc="Name of [Alt] key name used for sticky keys. Shouldn't be translated in many languages actually.">
+        alt
+      </message>
+      <message name="IDS_ASH_STICKY_KEY_SEARCH" desc="Name of [Search] key name used for sticky keys. Shouldn't be translated in many languages actually.">
+        search
+      </message>
 
       <!-- ChromeOS-specific strings -->
       <if expr="pp_ifdef('chromeos')">
         <part file="ash_chromeos_strings.grdp" />
       </if>
 
     </messages>
   </release>
 </grit>