Add ink drop ripple (but no highlight) to comboboxes in harmony.

ui/views/controls/menu/submenu_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_SUBMENU_VIEW_H_
 #define UI_VIEWS_CONTROLS_MENU_SUBMENU_VIEW_H_
 
 #include <string>
 
 #include "base/compiler_specific.h"
@@ skipping 22 matching lines @@
 // . Forwards the appropriate events to the MenuController. This allows the
 //   MenuController to update the selection as the user moves the mouse around.
 // . Renders the drop indicator during a drop operation.
 // . Shows and hides the window (a NativeWidget) when the menu is shown on
 //   screen.
 //
 // SubmenuView is itself contained in a MenuScrollViewContainer.
 // MenuScrollViewContainer handles showing as much of the SubmenuView as the
 // screen allows. If the SubmenuView is taller than the screen, scroll buttons
 // are provided that allow the user to see all the menu items.
-class VIEWS_EXPORT SubmenuView : public PrefixDelegate,
+class VIEWS_EXPORT SubmenuView : public View,
+                                 public PrefixDelegate,
                                  public ScrollDelegate {
  public:
   // The submenu's class name.
   static const char kViewClassName[];
 
   // Creates a SubmenuView for the specified menu item.
   explicit SubmenuView(MenuItemView* parent);
   ~SubmenuView() override;
 
   // Returns the number of child views that are MenuItemViews.
@@ skipping 166 matching lines @@
   float roundoff_error_;
 
   PrefixSelector prefix_selector_;
 
   DISALLOW_COPY_AND_ASSIGN(SubmenuView);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_SUBMENU_VIEW_H_