Add ash UI for third-party VPNs

ash/ash_chromeos_strings.grdp

 <?xml version="1.0" encoding="utf-8"?>
 <!-- ChromeOS-specific strings (included from ash_strings.grd).
      Everything in this file is wrapped in <if expr="chromeos">. -->
 <grit-part>
 
   <!-- Status tray charging strings. -->
   <message name="IDS_ASH_STATUS_TRAY_LOW_POWER_CHARGER_TITLE" desc="The title of a notification indicating that a low-current USB charger has been connected.">
     Low-power charger connected
   </message>
   <message name="IDS_ASH_STATUS_TRAY_LOW_POWER_CHARGER_MESSAGE" desc="The message body of a notification indicating that a low-current USB charger has been connected.">
@@ skipping 37 matching lines @@
   </message>
   <message name="IDS_ASH_STATUS_TRAY_DISABLE_WIFI" desc="The label used for the item to disable wifi.">
     Disable Wi-Fi
   </message>
   <message name="IDS_ASH_STATUS_TRAY_OTHER_WIFI" desc="The label used for the item to display other Wi-Fi networks.">
     Join other...
   </message>
   <message name="IDS_ASH_STATUS_TRAY_EXTENSION_CONTROLLED_WIFI" desc="The accessible text for the badge in the detailed network list indicating that the respective network's configuration may be controlled by an extension.">
     The extension "<ph name="EXTENSION_NAME">$1<ex>Nexus S</ex></ph>" can configure this network.
   </message>
-  <message name="IDS_ASH_STATUS_TRAY_OTHER_VPN" desc="The label used for the item to configure other private networks.">
-    Join other...
-  </message>
   <message name="IDS_ASH_STATUS_TRAY_TURN_ON_WIFI" desc="The label used for the item to turn on Wi-Fi networks.">
     Turn Wi-Fi on...
   </message>
   <message name="IDS_ASH_STATUS_TRAY_ENABLE_MOBILE" desc="The label used for the item to enable cellular networks.">
     Enable mobile data
   </message>
   <message name="IDS_ASH_STATUS_TRAY_DISABLE_MOBILE" desc="The label used for the item to disable cellular networks.">
     Disable mobile data
   </message>
   <message name="IDS_ASH_STATUS_TRAY_SETUP_MOBILE" desc="The label used for the item to setup cellular network when no SIM card in installed.">
@@ skipping 22 matching lines @@
   </message>
   <message name="IDS_ASH_STATUS_TRAY_BLUETOOTH_ACCEPT" desc="Message on button to accept Bluetooth pairing request.">
     Accept
   </message>
   <message name="IDS_ASH_STATUS_TRAY_BLUETOOTH_REJECT" desc="Message on button to reject Bluetooth pairing request.">
     Reject
   </message>
   <message name="IDS_ASH_STATUS_TRAY_BLUETOOTH_PAIRED" desc="Notification shown when a new device is paired with the computer.">
     Bluetooth device "<ph name="DEVICE_NAME">$1<ex>Nexus S</ex></ph>" has been paired and is now available to all users. You may remove this pairing using Settings.
   </message>
+  <message name="IDS_ASH_STATUS_TRAY_VPN_DISCONNECT" desc="Message on button that disconnects from the current VPN.">
+    Disconnect
+  </message>
 
   <!-- Ash multi-user warning dialog -->
   <message name="IDS_DESKTOP_CASTING_ACTIVE_TITLE" desc="The title for the dialog which tells the user that desktop casting is in progress, asking if the casting should be stopped before switching - or - the switch should be aborted.">
     Stop screen sharing?
   </message>
   <message name="IDS_DESKTOP_CASTING_ACTIVE_MESSAGE" desc="The message for the dialog which tells the user that desktop casting is in progress, asking if the casting should be stopped before switching - or - the switch should be aborted.">
     Screen sharing will stop when you switch to another user. Do you want to continue?
   </message>
   <message name="IDS_DESKTOP_CASTING_ACTIVE_BUTTON_SWITCH_USER" desc="The button label for the dialog which tells the user that desktop casting is in progress. By selecting this button the casting will be stopped and the user will get switched.">
     Yes
@@ skipping 293 matching lines @@
   <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>
 </grit-part>