Tray elements behave appropriately on the multiple signin screen (more like lock screen)

ash/system/bluetooth/tray_bluetooth.cc

Index: ash/system/bluetooth/tray_bluetooth.cc
diff --git a/ash/system/bluetooth/tray_bluetooth.cc b/ash/system/bluetooth/tray_bluetooth.cc
index 6f4509f8e8224a6fd50a79537cad687fa199d11b..8fbd0762eec009169f86ceff04b0bb170a050496 100644
--- a/ash/system/bluetooth/tray_bluetooth.cc
+++ b/ash/system/bluetooth/tray_bluetooth.cc
@@ -4,6 +4,7 @@
 
 #include "ash/system/bluetooth/tray_bluetooth.h"
 
+#include "ash/session/session_state_delegate.h"
 #include "ash/shell.h"
 #include "ash/system/tray/fixed_sized_scroll_view.h"
 #include "ash/system/tray/hover_highlight_view.h"
@@ -301,7 +302,14 @@ class BluetoothDetailedView : public TrayDetailsView,
 
     // Add bluetooth device requires a browser window, hide it for non logged in
     // user.
-    if (login_ == user::LOGGED_IN_NONE || login_ == user::LOGGED_IN_LOCKED)
+    bool userAddingRunning =
+        (ash::Shell::GetInstance()
+             ->session_state_delegate()
+             ->GetSessionState() ==
+         ash::SessionStateDelegate::SESSION_STATE_LOGIN_SECONDARY);

[oshima, 2014/08/01 20:31:22]

could you mind adding IsInSecondaryLoginScreen() utility method ?
(to be consistent with enum)

The better approach would be to have a object that represents the session state
(not a delegate), instead of enum but that's probably outside of the scope of
this CL.

[Roman Sorokin (ftl), 2014/08/05 13:44:08]

Done.

+
+    if (login_ == user::LOGGED_IN_NONE || login_ == user::LOGGED_IN_LOCKED ||
+        userAddingRunning)
       return;
 
     ash::SystemTrayDelegate* delegate =