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

ash/session/session_state_delegate.h

Index: ash/session/session_state_delegate.h
diff --git a/ash/session/session_state_delegate.h b/ash/session/session_state_delegate.h
index 89c1ff8d4f951d2bd76630ebddfaf86f17107b8c..d51375a60e7d13dd1bb053b12a4fb19165bfba0c 100644
--- a/ash/session/session_state_delegate.h
+++ b/ash/session/session_state_delegate.h
@@ -137,6 +137,11 @@ class ASH_EXPORT SessionStateDelegate {
   // Adds or removes sessions state observer.
   virtual void AddSessionStateObserver(SessionStateObserver* observer) = 0;
   virtual void RemoveSessionStateObserver(SessionStateObserver* observer) = 0;
+
+  bool IsInSecondaryLoginScreen() const {

[oshima, 2014/08/06 19:47:41]

move this to (new) .cc (preferred). I'm fine to move it to Shell if you want. 

[Roman Sorokin (ftl), 2014/08/07 12:45:55]

Done.

+    return GetSessionState() ==
+           ash::SessionStateDelegate::SESSION_STATE_LOGIN_SECONDARY;
+  }
 };
 
 }  // namespace ash