Use a single views::MenuConfig instance for each platform

ui/views/controls/menu/menu_item_view.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_VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 306 matching lines @@
 
   // Set top and bottom margins in pixels.  If no margin is set or a
   // negative margin is specified then MenuConfig values are used.
   void SetMargins(int top_margin, int bottom_margin);
 
   // Suppress the right margin if this is set to false.
   void set_use_right_margin(bool use_right_margin) {
     use_right_margin_ = use_right_margin;
   }
 
-  // Returns a reference to MenuConfig to be used with this menu.
-  const MenuConfig& GetMenuConfig() const;
-
  protected:
   // Creates a MenuItemView. This is used by the various AddXXX methods.
   MenuItemView(MenuItemView* parent, int command, Type type);
 
   // MenuRunner owns MenuItemView and should be the only one deleting it.
   ~MenuItemView() override;
 
   void ChildPreferredSizeChanged(View* child) override;
 
   const char* GetClassName() const override;
@@ skipping 181 matching lines @@
   // If set to false, the right margin will be removed for menu lines
   // containing other elements.
   bool use_right_margin_;
 
   DISALLOW_COPY_AND_ASSIGN(MenuItemView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_ITEM_VIEW_H_