Attempt fixing a crash. Looks like NativeMenuWin was getting leaked by Menu2....

views/controls/menu/menu_2.h

 // Copyright (c) 2009 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 CONTROLS_MENU_VIEWS_MENU_2_H_
 #define CONTROLS_MENU_VIEWS_MENU_2_H_
 
 #include "base/gfx/native_widget_types.h"
+#include "base/scoped_ptr.h"
 #include "base/string16.h"
+#include "views/controls/menu/menu_wrapper.h"
 
 namespace gfx {
 class Point;
 }
 class SkBitmap;
 
 namespace views {
 
 class Accelerator;
 class Menu2;
-class MenuWrapper;
 
 // The Menu2Model is an interface implemented by an object that provides the
 // content of a menu.
 class Menu2Model {
  public:
   virtual ~Menu2Model() {}
 
   // The type of item.
   enum ItemType {
     TYPE_COMMAND,
@@ skipping 104 matching lines @@
   // For submenus.
   gfx::NativeMenu GetNativeMenu() const;
 
   // Accessors.
   Menu2Model* model() const { return model_; }
 
  private:
   Menu2Model* model_;
 
   // The object that actually implements the menu.
-  MenuWrapper* wrapper_;
+  scoped_ptr<MenuWrapper> wrapper_;
 
   DISALLOW_COPY_AND_ASSIGN(Menu2);
 };
 
 }  // namespace views
 
 #endif  // CONTROLS_MENU_VIEWS_MENU_2_H_