Add ARC++ kiosk menu items and ability to start kiosk session.

chrome/browser/chromeos/login/users/chrome_user_manager_impl.h

Index: chrome/browser/chromeos/login/users/chrome_user_manager_impl.h
diff --git a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.h b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.h
index 433659a007a1249fcb5211fe294b75cfc06d105b..1eec5eb1142a97f9a0974a10dfd3af60a89ee479 100644
--- a/chrome/browser/chromeos/login/users/chrome_user_manager_impl.h
+++ b/chrome/browser/chromeos/login/users/chrome_user_manager_impl.h
@@ -165,6 +165,7 @@ class ChromeUserManagerImpl
   void DemoAccountLoggedIn() override;
   void GuestUserLoggedIn() override;
   void KioskAppLoggedIn(user_manager::User* user) override;
+  void ArcKioskAppLoggedIn(user_manager::User* user) override;
   void PublicAccountUserLoggedIn(user_manager::User* user) override;
   void RegularUserLoggedIn(const AccountId& account_id) override;
   void RegularUserLoggedInAsEphemeral(const AccountId& account_id) override;