mash: Migrate shelf menus to wm common types

ash/shelf/shelf_widget.cc

Index: ash/shelf/shelf_widget.cc
diff --git a/ash/shelf/shelf_widget.cc b/ash/shelf/shelf_widget.cc
index 20c1174c67784844667a2647915ae2d5ea46aebe..73451cd12ecd9f155bc96e9a8552c4823a09babd 100644
--- a/ash/shelf/shelf_widget.cc
+++ b/ash/shelf/shelf_widget.cc
@@ -720,7 +720,7 @@ void ShelfWidget::CreateShelf(WmShelfAura* wm_shelf_aura) {
 
   Shell* shell = Shell::GetInstance();
   ShelfDelegate* delegate = shell->GetShelfDelegate();
-  shelf_.reset(new Shelf(shell->shelf_model(), delegate, this));
+  shelf_.reset(new Shelf(shell->shelf_model(), delegate, wm_shelf_aura, this));
   // Must be initialized before the delegate is notified because the delegate
   // may try to access the WmShelf.
   wm_shelf_aura->SetShelf(shelf_.get());