Turn Message Center Menus Async

ui/message_center/views/message_view_context_menu_controller.h

Index: ui/message_center/views/message_view_context_menu_controller.h
diff --git a/ui/message_center/views/message_view_context_menu_controller.h b/ui/message_center/views/message_view_context_menu_controller.h
index 996ae5901ec6599fe064c8b58d120d058fc0eeed..321937de7fd239449d59fbef6ebb4f1c3e0cce80 100644
--- a/ui/message_center/views/message_view_context_menu_controller.h
+++ b/ui/message_center/views/message_view_context_menu_controller.h
@@ -5,10 +5,21 @@
 #ifndef UI_MESSAGE_CENTER_VIEWS_MESSAGE_VIEW_CONTEXT_MENU_CONTROLLER_H_
 #define UI_MESSAGE_CENTER_VIEWS_MESSAGE_VIEW_CONTEXT_MENU_CONTROLLER_H_
 
+#include <memory>
+
 #include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "ui/views/context_menu_controller.h"
 
+namespace ui {
+class MenuModel;
+}  // namespace ui
+
+namespace views {
+class MenuModelAdapter;
+class MenuRunner;
+}  // namespace views
+
 namespace message_center {
 class MessageCenterController;
 
@@ -24,8 +35,15 @@ class MessageViewContextMenuController : public views::ContextMenuController {
                               const gfx::Point& point,
                               ui::MenuSourceType source_type) override;
 
+  // Callback for MenuModelAdapter
+  void OnMenuClosed();
+
   MessageCenterController* controller_;
 
+  std::unique_ptr<ui::MenuModel> menu_model_;
+  std::unique_ptr<views::MenuModelAdapter> menu_model_adapter_;
+  std::unique_ptr<views::MenuRunner> menu_runner_;
+
   DISALLOW_COPY_AND_ASSIGN(MessageViewContextMenuController);
 };