ash: Use session_manager::SessionState

ash/common/session/session_types.h

Index: ash/common/session/session_types.h
diff --git a/ash/common/session/session_types.h b/ash/common/session/session_types.h
index 22604d12735f7efca9914304bce787b9925cb989..937feb2e503ef32ce140208a1ead4f046ad5a13b 100644
--- a/ash/common/session/session_types.h
+++ b/ash/common/session/session_types.h
@@ -11,6 +11,22 @@ namespace ash {
 // index 0 is the currently active user.
 using UserIndex = int;
 
+// Defines session state i.e. whether session is running or not and
+// whether user session is blocked by things like multi-profile login.
+enum class SessionState {

[James Cook, 2016/10/15 00:12:41]

Thanks for switching to enum class!

+  // When primary user login UI is shown i.e. after boot or sign out,
+  // no active user session exists yet.
+  LOGIN_PRIMARY = 0,
+
+  // When secondary user login UI is shown i.e. other users are
+  // already logged in and is currently adding another user to the session.
+  LOGIN_SECONDARY,
+
+  // Inside a user session (including lock screen),
+  // no login UI (primary or multi-profiles) is shown.
+  ACTIVE,
+};
+
 }  // namespace ash
 
 #endif  // ASH_COMMON_SESSION_SESSION_TYPES_H_