cros: Move system tray delegate widget container code to SystemTrayClient

chrome/browser/ui/ash/system_tray_client.h

Index: chrome/browser/ui/ash/system_tray_client.h
diff --git a/chrome/browser/ui/ash/system_tray_client.h b/chrome/browser/ui/ash/system_tray_client.h
index 2628b493d8d228285587467a5a11f4dcb3b618f8..b3923bd5652b220512c91ca940561c5e27fe0780 100644
--- a/chrome/browser/ui/ash/system_tray_client.h
+++ b/chrome/browser/ui/ash/system_tray_client.h
@@ -10,6 +10,10 @@
 #include "chrome/browser/chromeos/system/system_clock_observer.h"
 #include "mojo/public/cpp/bindings/binding.h"
 
+namespace ash {
+enum class LoginStatus;
+}
+
 // Handles method calls delegated back to chrome from ash. Also notifies ash of
 // relevant state changes in chrome.
 // TODO: Consider renaming this to SystemTrayClientChromeOS.
@@ -21,6 +25,13 @@ class SystemTrayClient : public ash::mojom::SystemTrayClient,
 
   static SystemTrayClient* Get();
 
+  // Returns the login state based on the user type, lock screen status, etc.
+  static ash::LoginStatus GetUserLoginStatus();
+
+  // Returns the container id for the parent window for new dialogs. The parent
+  // varies based on the current login and lock screen state.
+  static int GetDialogParentContainerId();
+
   // ash::mojom::SystemTrayClient:
   void ShowSettings() override;
   void ShowDateSettings() override;