cros: Change max users to be a constant

components/session_manager/session_manager_types.h

Index: components/session_manager/session_manager_types.h
diff --git a/components/session_manager/session_manager_types.h b/components/session_manager/session_manager_types.h
index 92e72a87f06f25593635dfa73ea972ddbe7e3f35..5a88b4e7d89c2c461008efb6e8e5ef2385d1c52f 100644
--- a/components/session_manager/session_manager_types.h
+++ b/components/session_manager/session_manager_types.h
@@ -48,6 +48,9 @@ struct Session {
   AccountId user_account_id;
 };
 
+// Limits the number of logged in users to 10 due to memory constraints.
+constexpr int kMaxmiumNumberOfUserSessions = 10;
+
 }  // namespace session_manager
 
 #endif  // COMPONENTS_SESSION_MANAGER_SESSION_MANAGER_TYPES_H_