Revert "Hide web notification tray when LoginStatus is locked"

This reverts commit 198e264e.

The root cause of the crash has been fixed and we don't need this patch now.

BUG=625357
TBR=warx@chromium.org

Review-Url: https://codereview.chromium.org/2151613002
Cr-Commit-Position: refs/heads/master@{#405239}

ash/common/system/web_notification/web_notification_tray.cc

@@ -516,9 +516,8 @@ message_center::MessageCenter* WebNotificationTray::message_center() const {
 
 bool WebNotificationTray::IsLoggedIn() const {
   WmShell* shell = WmShell::Get();
-  LoginStatus status = shell->system_tray_delegate()->GetUserLoginStatus();
-  return status != LoginStatus::NOT_LOGGED_IN &&
-         status != LoginStatus::LOCKED &&
+  return shell->system_tray_delegate()->GetUserLoginStatus() !=
+             LoginStatus::NOT_LOGGED_IN &&
          !shell->GetSessionStateDelegate()->IsInSecondaryLoginScreen();
 }