GTTF: Add missing virtual destructors.

chrome/browser/ui/gtk/avatar_menu_item_gtk.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 CHROME_BROWSER_UI_GTK_AVATAR_MENU_ITEM_GTK_H_
 #define CHROME_BROWSER_UI_GTK_AVATAR_MENU_ITEM_GTK_H_
 
 #include <gtk/gtk.h>
 
 #include "chrome/browser/profiles/avatar_menu_model.h"
@@ skipping 11 matching lines @@
 class AvatarMenuItemGtk : public content::NotificationObserver {
  public:
   // Delegates opening or editing a profile.
   class Delegate {
    public:
     // Open a new browser window using the profile at |profile_index|.
     virtual void OpenProfile(size_t profile_index) = 0;
 
     // Edit the profile given by |profile_index|.
     virtual void EditProfile(size_t profile_index) = 0;
+
+   protected:
+    virtual ~Delegate() { }
   };
 
   AvatarMenuItemGtk(Delegate* delegate,
                     const AvatarMenuModel::Item& item,
                     size_t item_index,
                     GtkThemeService* theme_service);
   virtual ~AvatarMenuItemGtk();
 
   // Returns the root widget for this menu item.
   GtkWidget* widget() { return widget_.get(); }
@@ skipping 63 matching lines @@
   // The unhighlighted color. Depending on the theme, this is either NULL or a
   // pointer to static data.
   const GdkColor* unhighlighted_color_;
 
   content::NotificationRegistrar registrar_;
 
   DISALLOW_COPY_AND_ASSIGN(AvatarMenuItemGtk);
 };
 
 #endif  // CHROME_BROWSER_UI_GTK_AVATAR_MENU_ITEM_GTK_H_