Revert "chromeos: Fix shelf appearing at login screen under mash"

ash/common/wm_root_window_controller.h

Index: ash/common/wm_root_window_controller.h
diff --git a/ash/common/wm_root_window_controller.h b/ash/common/wm_root_window_controller.h
index 8b6387c4743399a382a09cf2b39ebf71f005a288..b0f75c78a3ecfe7e8f99b735703d4d0cacb22f8a 100644
--- a/ash/common/wm_root_window_controller.h
+++ b/ash/common/wm_root_window_controller.h
@@ -100,6 +100,10 @@ class ASH_EXPORT WmRootWindowController {
   // Creates the shelf for this root window and notifies observers.
   void CreateShelf();
 
+  // Show shelf view if it was created hidden (before session has started).
+  // TODO(jamescook): Eliminate this and handle show via Shelf.
+  void ShowShelf();
+
   // Returns the system tray controller. May be null for external displays.
   SystemTray* GetSystemTray();