Add undeclared virtual destructors part 2...

views/controls/button/native_button_wrapper.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 VIEWS_CONTROLS_BUTTON_NATIVE_BUTTON_WRAPPER_H_
 #define VIEWS_CONTROLS_BUTTON_NATIVE_BUTTON_WRAPPER_H_
 
 #include "gfx/native_widget_types.h"
 
 namespace views {
@@ skipping 48 matching lines @@
 
   // Return the width of the button. Used for fixed size buttons (checkboxes and
   // radio buttons) only.
   static int GetFixedWidth();
 
   // Creates an appropriate NativeButtonWrapper for the platform.
   static NativeButtonWrapper* CreateNativeButtonWrapper(NativeButton* button);
   static NativeButtonWrapper* CreateCheckboxWrapper(Checkbox* checkbox);
   static NativeButtonWrapper* CreateRadioButtonWrapper(
       RadioButton* radio_button);
+
+ protected:
+  virtual ~NativeButtonWrapper() {}
 };
 
 }  // namespace views
 
 #endif  // VIEWS_CONTROLS_BUTTON_NATIVE_BUTTON_WRAPPER_H_