ash: Use enum for SessionController::CycleActiveUser

ash/public/interfaces/session_controller_traits.h

Index: ash/public/interfaces/session_controller_traits.h
diff --git a/ash/public/interfaces/session_controller_traits.h b/ash/public/interfaces/session_controller_traits.h
index 059420da820bfb7e5c8cfae7140280b1ea832af6..91034d1d61df506b8913ba2d684f0f31ba7eab23 100644
--- a/ash/public/interfaces/session_controller_traits.h
+++ b/ash/public/interfaces/session_controller_traits.h
@@ -165,6 +165,33 @@ struct EnumTraits<ash::mojom::AddUserSessionPolicy, ash::AddUserSessionPolicy> {
   }
 };
 
+template <>
+struct EnumTraits<ash::mojom::CycleUser, ash::CycleUser> {
+  static ash::mojom::CycleUser ToMojom(ash::CycleUser input) {
+    switch (input) {
+      case ash::CycleUser::CYCLE_TO_NEXT_USER:
+        return ash::mojom::CycleUser::CYCLE_TO_NEXT_USER;
+      case ash::CycleUser::CYCLE_TO_PREVIOUS_USER:
+        return ash::mojom::CycleUser::CYCLE_TO_PREVIOUS_USER;
+    }
+    NOTREACHED();
+    return ash::mojom::CycleUser::CYCLE_TO_NEXT_USER;
+  }
+
+  static bool FromMojom(ash::mojom::CycleUser input, ash::CycleUser* out) {
+    switch (input) {
+      case ash::mojom::CycleUser::CYCLE_TO_NEXT_USER:
+        *out = ash::CycleUser::CYCLE_TO_NEXT_USER;
+        return true;
+      case ash::mojom::CycleUser::CYCLE_TO_PREVIOUS_USER:
+        *out = ash::CycleUser::CYCLE_TO_PREVIOUS_USER;
+        return true;
+    }
+    NOTREACHED();
+    return false;
+  }
+};
+
 }  // namespace mojo
 
 #endif  // ASH_PUBLIC_INTERFACES_SESSION_CONTROLLER_TRAITS_H_