GTTF: Add missing virtual destructors.

chrome/browser/ui/website_settings/permission_menu_model.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_WEBSITE_SETTINGS_PERMISSION_MENU_MODEL_H_
 #define CHROME_BROWSER_UI_WEBSITE_SETTINGS_PERMISSION_MENU_MODEL_H_
 
 #include "ui/base/models/simple_menu_model.h"
 #include "chrome/common/content_settings.h"
 #include "chrome/common/content_settings_types.h"
 #include "googleurl/src/gurl.h"
 
 class PermissionMenuModel : public ui::SimpleMenuModel,
                             public ui::SimpleMenuModel::Delegate {
  public:
   enum CommandID {
     COMMAND_SET_TO_DEFAULT,
     COMMAND_SET_TO_ALLOW,
     COMMAND_SET_TO_BLOCK,
   };
 
   class Delegate {
    public:
     // Executes the command with the given |command_id|.
     virtual void ExecuteCommand(int command_id) = 0;
     // Returns true if the command with the given |command_id| should be
     // checked.
     virtual bool IsCommandIdChecked(int command_id) = 0;
+
+   protected:
+    virtual ~Delegate() { }
   };
 
   PermissionMenuModel(Delegate* delegate,
                       const GURL& url,
                       ContentSettingsType type,
                       ContentSetting default_setting,
                       ContentSetting current_setting);
 
   // Overridden from ui::SimpleMenuModel::Delegate:
   virtual bool IsCommandIdChecked(int command_id) const OVERRIDE;
   virtual bool IsCommandIdEnabled(int command_id) const OVERRIDE;
   virtual bool GetAcceleratorForCommandId(
       int command_id,
       ui::Accelerator* accelerator) OVERRIDE;
   virtual void ExecuteCommand(int command_id) OVERRIDE;
 
  private:
   // The delegate of the |PermissionMenuModel|. |delegate_| can be NULL.
   Delegate* delegate_;
 
   // The URL of the website for which to display site permissions.
   GURL site_url_;
 
   DISALLOW_COPY_AND_ASSIGN(PermissionMenuModel);
 };
 
 #endif  // CHROME_BROWSER_UI_WEBSITE_SETTINGS_PERMISSION_MENU_MODEL_H_