SimpleMenuModel and ButtonMenuItemModel implement AcceleratorProvider.

ui/base/models/simple_menu_model.h

 // 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.
 
 #ifndef UI_BASE_MODELS_SIMPLE_MENU_MODEL_H_
 #define UI_BASE_MODELS_SIMPLE_MENU_MODEL_H_
 
 #include <vector>
 
+#include "base/compiler_specific.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "base/strings/string16.h"
+#include "ui/base/accelerators/accelerator.h"
 #include "ui/base/models/menu_model.h"
 
 namespace gfx {
 class Image;
 }
 
 namespace ui {
 
 class ButtonMenuItemModel;
 
 // A simple MenuModel implementation with an imperative API for adding menu
 // items. This makes it easy to construct fixed menus. Menus populated by
 // dynamic data sources may be better off implementing MenuModel directly.
 // The breadth of MenuModel is not exposed through this API.
 class UI_BASE_EXPORT SimpleMenuModel : public MenuModel {
  public:
-  class UI_BASE_EXPORT Delegate {
+  class UI_BASE_EXPORT Delegate
+      : NON_EXPORTED_BASE(public AcceleratorProvider) {
    public:
-    virtual ~Delegate() {}
+    ~Delegate() override {}
 
     // Methods for determining the state of specific command ids.
     virtual bool IsCommandIdChecked(int command_id) const = 0;
     virtual bool IsCommandIdEnabled(int command_id) const = 0;
     virtual bool IsCommandIdVisible(int command_id) const;
 
-    // Gets the accelerator for the specified command id. Returns true if the
-    // command id has a valid accelerator, false otherwise. By default, returns
-    // false for all commands.
-    virtual bool GetAcceleratorForCommandId(int command_id,
-                                            ui::Accelerator* accelerator) const;
-
     // Some command ids have labels, sublabels, minor text and icons that change
     // over time.
     virtual bool IsItemForCommandIdDynamic(int command_id) const;
     virtual base::string16 GetLabelForCommandId(int command_id) const;
     virtual base::string16 GetSublabelForCommandId(int command_id) const;
     virtual base::string16 GetMinorTextForCommandId(int command_id) const;
     // Gets the icon for the item with the specified id, returning true if there
     // is an icon, false otherwise.
     virtual bool GetIconForCommandId(int command_id,
                                      gfx::Image* icon) const;
 
     // Notifies the delegate that the item with the specified command id was
     // visually highlighted within the menu.
     virtual void CommandIdHighlighted(int command_id);
 
     // Performs the action associates with the specified command id.
     // The passed |event_flags| are the flags from the event which issued this
     // command and they can be examined to find modifier keys.
     virtual void ExecuteCommand(int command_id, int event_flags) = 0;
 
     // Notifies the delegate that the menu is about to show.
     virtual void MenuWillShow(SimpleMenuModel* source);
 
     // Notifies the delegate that the menu has closed.
     virtual void MenuClosed(SimpleMenuModel* source);
+
+    // AcceleratorProvider overrides:
+    // By default, returns false for all commands. Can be further overridden.
+    bool GetAcceleratorForCommandId(
+        int command_id,
+        ui::Accelerator* accelerator) const override;
   };
 
   // The Delegate can be NULL, though if it is items can't be checked or
   // disabled.
   explicit SimpleMenuModel(Delegate* delegate);
   ~SimpleMenuModel() override;
 
   // Methods for adding items to the model.
   void AddItem(int command_id, const base::string16& label);
   void AddItemWithStringId(int command_id, int string_id);
@@ skipping 115 matching lines @@
   MenuModelDelegate* menu_model_delegate_;
 
   base::WeakPtrFactory<SimpleMenuModel> method_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SimpleMenuModel);
 };
 
 }  // namespace ui
 
 #endif  // UI_BASE_MODELS_SIMPLE_MENU_MODEL_H_