Make IsTriggerableEvent take Event objects and use it to verify whether tap events should trigger.

ui/views/controls/menu/menu_delegate.h

 // Copyright (c) 2011 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_DELEGATE_H_
 #define UI_VIEWS_CONTROLS_MENU_MENU_DELEGATE_H_
 #pragma once
 
 #include <set>
 #include <string>
@@ skipping 96 matching lines @@
   // indicate that all menus should be closed. Return false if only the
   // context menu should be closed.
   virtual bool ShouldCloseAllMenusOnExecute(int id);
 
   // Executes the specified command. mouse_event_flags give the flags of the
   // mouse event that triggered this to be invoked (views::MouseEvent
   // flags). mouse_event_flags is 0 if this is triggered by a user gesture
   // other than a mouse event.
   virtual void ExecuteCommand(int id, int mouse_event_flags);
 
-  // Returns true if the specified mouse event is one the user can use
-  // to trigger, or accept, the mouse. Defaults to left or right mouse buttons.
-  virtual bool IsTriggerableEvent(MenuItemView* view, const MouseEvent& e);
+  // Returns true if the specified event is one the user can use to trigger, or
+  // accept, the item. Defaults to left or right mouse buttons or tap.
+  virtual bool IsTriggerableEvent(MenuItemView* view, const Event& e);
 
   // Invoked to determine if drops can be accepted for a submenu. This is
   // ONLY invoked for menus that have submenus and indicates whether or not
   // a drop can occur on any of the child items of the item. For example,
   // consider the following menu structure:
   //
   // A
   //   B
   //   C
   //
@@ skipping 70 matching lines @@
   // Invoked prior to a menu being shown.
   virtual void WillShowMenu(MenuItemView* menu);
 
   // Invoked prior to a menu being hidden.
   virtual void WillHideMenu(MenuItemView* menu);
 };
 
 }  // namespace views
 
 #endif  // UI_VIEWS_CONTROLS_MENU_MENU_DELEGATE_H_