cros: Ensure task manager shows correct title for lock screen webview

chrome/app/chromeos_strings.grdp

Index: chrome/app/chromeos_strings.grdp
diff --git a/chrome/app/chromeos_strings.grdp b/chrome/app/chromeos_strings.grdp
index 465ff3c3c74ade12d1227541486ef7c2ce4b5fa1..52147b9775cce1c9e63fe40e2d020572bc38d08e 100644
--- a/chrome/app/chromeos_strings.grdp
+++ b/chrome/app/chromeos_strings.grdp
@@ -2158,6 +2158,9 @@ Press any key to continue exploring.
   <message name="IDS_KIOSK_APPS_BUTTON" desc="Text shown on a button that brings up the kiosk apps menu on login screen">
     Apps
   </message>
+  <message name="IDS_LOCK_SCREEN_TASK_MANAGER_NAME" desc="The name of the lock screen as it appears in the task manager. This will be prefixed with another string, such as 'Extension: ' (see IDS_TASK_MANAGER_EXTENSION_PREFIX)">
+    Lock Screen
+  </message>
   <message name="IDS_LOGIN_USER_ADDING_BANNER" desc="Text shown on a banner in user adding screen.">
     Add an account to multiple sign-in. All signed-in accounts can be accessed without a password, so this feature should only be used with trusted accounts.
   </message>