Fix bugs in the display notification

ash/ash_chromeos_strings.grdp

Index: ash/ash_chromeos_strings.grdp
diff --git a/ash/ash_chromeos_strings.grdp b/ash/ash_chromeos_strings.grdp
index c2a38c085d97063d3b8fb9c5f24ce61a3b948816..ad926d40b785771079e3ca558ec2bcefef0f6e7a 100644
--- a/ash/ash_chromeos_strings.grdp
+++ b/ash/ash_chromeos_strings.grdp
@@ -287,6 +287,9 @@
   <message name="IDS_ASH_STATUS_TRAY_DISPLAY_EXTENDED" desc="The label used in the tray to show that the current status is extended.">
     Extending screen to <ph name="DISPLAY_NAME">$1</ph>
   </message>
+  <message name="IDS_ASH_STATUS_TRAY_DISPLAY_REMOVED" desc="The text of the notification to show when a display is removed.">
+    Removed display <ph name="DISPLAY_NAME">$1</ph>
+  </message>
   <message name="IDS_ASH_STATUS_TRAY_DISPLAY_MIRRORING_NO_INTERNAL" desc="The label used in the tray to show that the current status is mirroring and the device doesn't have the internal display.">
     Mirroring
   </message>
@@ -299,6 +302,9 @@
   <message name="IDS_ASH_STATUS_TRAY_DISPLAY_DOCKED_DESCRIPTION" desc="The body of the notification indicating that the system is in docked mode.">
     You can keep using your <ph name="DEVICE_TYPE">$1<ex>Chromebook</ex></ph> while it's connected to an external display, even with the lid closed.
   </message>
+  <message name="IDS_ASH_STATUS_TRAY_DISPLAY_DOCKED_EXITING" desc="The notification message shown to the user when the device is exiting docked mode.">
+    Exiting docked mode
+  </message>
   <message name="IDS_ASH_STATUS_TRAY_DISPLAY_RESOLUTION_CHANGED" desc="The label used in the tray to notify that the display resolution settings has changed.">
     <ph name="DISPLAY_NAME">$1</ph> resolution was changed to <ph name="RESOLUTION">$2</ph>
   </message>
@@ -329,6 +335,9 @@
   <message name="IDS_ASH_STATUS_TRAY_DISPLAY_UNIFIED" desc="The title of the notification indicating that the system is in unified desktop mode.">
     Unified desktop mode
   </message>
+  <message name="IDS_ASH_STATUS_TRAY_DISPLAY_UNIFIED_EXITING" desc="The title of the notification indicating that the system is exiting unified desktop mode.">
+    Exiting unified desktop mode
+  </message>
   <message name="IDS_ASH_STATUS_TRAY_CAPS_LOCK_ENABLED" desc="The label used for the tray item to indicate caps lock is on and to toggle caps lock by the click.">
     CAPS LOCK is on
   </message>