cros: Use SessionController in UserMetricsRecorder to get login status

ash/metrics/user_metrics_recorder.cc

Index: ash/metrics/user_metrics_recorder.cc
diff --git a/ash/metrics/user_metrics_recorder.cc b/ash/metrics/user_metrics_recorder.cc
index f06b8c6f8a00ae8617c6c94c515586c4c3b11b3f..a6ff35eafe6f271c10eeb30f26cd1d2f4cf67d29 100644
--- a/ash/metrics/user_metrics_recorder.cc
+++ b/ash/metrics/user_metrics_recorder.cc
@@ -8,13 +8,13 @@
 #include "ash/metrics/pointer_metrics_recorder.h"
 #include "ash/public/cpp/shelf_item.h"
 #include "ash/public/cpp/shell_window_ids.h"
+#include "ash/session/session_controller.h"
 #include "ash/session/session_state_delegate.h"
 #include "ash/shelf/shelf_model.h"
 #include "ash/shelf/shelf_view.h"
 #include "ash/shelf/wm_shelf.h"
 #include "ash/shell.h"
 #include "ash/shell_port.h"
-#include "ash/system/tray/system_tray_delegate.h"
 #include "ash/wm/window_state.h"
 #include "ash/wm/window_state_aura.h"
 #include "ash/wm_window.h"
@@ -79,34 +79,21 @@ ActiveWindowStateType GetActiveWindowState() {
 
 // Returns true if kiosk mode is active.
 bool IsKioskModeActive() {
-  return Shell::Get()->system_tray_delegate()->GetUserLoginStatus() ==
+  return Shell::Get()->session_controller()->login_status() ==
          LoginStatus::KIOSK_APP;
 }
 
 // Returns true if ARC kiosk mode is active.
 bool IsArcKioskModeActive() {
-  return Shell::Get()->system_tray_delegate()->GetUserLoginStatus() ==
+  return Shell::Get()->session_controller()->login_status() ==
          LoginStatus::ARC_KIOSK_APP;
 }
 
 // Returns true if there is an active user and their session isn't currently
 // locked.
 bool IsUserActive() {
-  switch (Shell::Get()->system_tray_delegate()->GetUserLoginStatus()) {
-    case LoginStatus::NOT_LOGGED_IN:
-    case LoginStatus::LOCKED:
-      return false;
-    case LoginStatus::USER:
-    case LoginStatus::OWNER:
-    case LoginStatus::GUEST:
-    case LoginStatus::PUBLIC:
-    case LoginStatus::SUPERVISED:
-    case LoginStatus::KIOSK_APP:
-    case LoginStatus::ARC_KIOSK_APP:
-      return true;
-  }
-  NOTREACHED();
-  return false;
+  SessionController* session = Shell::Get()->session_controller();
+  return session->IsActiveUserSessionStarted() && !session->IsScreenLocked();
 }
 
 // Array of window container ids that contain visible windows to be counted for