mash: Migrate shelf menus to wm common types

ash/root_window_controller.cc

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/root_window_controller.h"
 
 #include <queue>
 #include <vector>
 
 #include "ash/ash_constants.h"
@@ skipping 548 matching lines @@
   // We assume in throughout the code that this will not return NULL. If code
   // triggers this for valid reasons, it should test status_area_widget first.
   CHECK(shelf_widget_->status_area_widget());
   return shelf_widget_->status_area_widget()->system_tray();
 }
 
 void RootWindowController::ShowContextMenu(const gfx::Point& location_in_screen,
                                            ui::MenuSourceType source_type) {
   ShellDelegate* delegate = Shell::GetInstance()->delegate();
   DCHECK(delegate);
-  menu_model_.reset(
-      delegate->CreateContextMenu(shelf_widget_->shelf(), nullptr));
+  menu_model_.reset(delegate->CreateContextMenu(wm_shelf_aura_.get(), nullptr));
   if (!menu_model_)
     return;
 
   menu_model_adapter_.reset(new views::MenuModelAdapter(
       menu_model_.get(),
       base::Bind(&RootWindowController::OnMenuClosed, base::Unretained(this))));
 
   // Background controller may not be set yet if user clicked on status are
   // before initial animation completion. See crbug.com/222218
   if (!wallpaper_controller_.get())
@@ skipping 306 matching lines @@
     aura::Window* primary_root_window = Shell::GetInstance()
                                             ->window_tree_host_manager()
                                             ->GetPrimaryRootWindow();
     return GetRootWindowSettings(primary_root_window)->controller;
   }
 
   return GetRootWindowSettings(root_window)->controller;
 }
 
 }  // namespace ash