Add TrayLocale for locale change notifications.

ash/ash_strings.grd

Index: ash/ash_strings.grd
diff --git a/ash/ash_strings.grd b/ash/ash_strings.grd
index d8d5c0c62424325e0ecef773713a838541a777df..86359e5c89afc863b9f2bdf031327d652eec42bf 100644
--- a/ash/ash_strings.grd
+++ b/ash/ash_strings.grd
@@ -234,6 +234,12 @@ This file contains the strings for ash.
       <message name="IDS_ASH_STATUS_TRAY_NETWORK_PROXY_SETTINGS" desc="The label used in the proxy settings entry in the network dialog in the login screen.">
         Proxy...
       </message>
+      <message name="IDS_ASH_STATUS_TRAY_LOCALE_CHANGE_MESSAGE" desc="The message used for locale change notifications in the system tray.">
+        The language has changed from "<ph name="FROM_LOCALE">$1<ex>Italian</ex></ph>" to "<ph name="TO_LOCALE">$2<ex>English (United States)</ex></ph>" after syncing your settings.
+      </message>
+      <message name="IDS_ASH_STATUS_TRAY_LOCALE_REVERT_MESSAGE" desc="Link to revert a change.">
+        Change back to "<ph name="FROM_LOCALE">$1<ex>Italian</ex></ph>" (requires restart)
+      </message>
       <message name="IDS_ASH_STATUS_TRAY_AIRPLANE_MODE" desc="The label used in the network dialog to turn on airplane mode.">
         Airplane mode
       </message>