Adding a dialog which explains that the multi user session has ended because a user policy has chan…

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 ff0c395f6f6faffc0b8eb2d1c531e3b12d428dcd..55b38b47ccad95aa94e7c578531bac3c30adc842 100644
--- a/chrome/app/chromeos_strings.grdp
+++ b/chrome/app/chromeos_strings.grdp
@@ -4712,7 +4712,7 @@ Battery full
     Multiple sign-in
   </message>
   <message name="IDS_MULTIPROFILES_INTRO_MESSAGE" desc="Content of the multi-profiles intro dialog shown when the user adds another user in multi-profiles mode.">
-     This feature allows you to access quickly any signed-in user without requiring a password.
+    This feature allows you to access quickly any signed-in user without requiring a password.
   </message>
   <message name="IDS_MULTIPROFILES_INTRO_EXPLANATION" desc="Content of the multi-profiles intro dialog shown when the user adds another user in multi-profiles mode.">
     Only use this feature with accounts you trust.
@@ -4720,6 +4720,16 @@ Battery full
   <message name="IDS_MULTIPROFILES_INTRO_NOSHOW_AGAIN" desc="In multi-profiles intro dialog, text for no-show-again option.">
     Got it, don't show me this again.
   </message>
+  <message name="IDS_MULTIPROFILES_SESSION_ABORT_HEADLINE" desc="Describes that the current multi profile session ends because one user left.">
+    Multiple sign-in has been disallowed for a user in this session
+  </message>
+  <message name="IDS_MULTIPROFILES_SESSION_ABORT_MESSAGE" desc="Content of the description that the current multi profile session ended because one user left.">
+    An administrator has disallowed multiple sign-in for <ph name="USER_EMAIL">$1<ex>john@google.com</ex></ph>.
+All users must sign out to continue.
+  </message>
+  <message name="IDS_MULTIPROFILES_SESSION_ABORT_BUTTON_LABEL" desc="Button label for the button in the multi profile session ended because one user left dialog.">
+    Sign out
+  </message>
 
   <!-- First-run tutorial -->
   <message name="IDS_FIRST_RUN_GREETING_STEP_HEADER" desc="Greeting message shown as header of the first dialog of first-run tutorial.">