Revert "Fix a ton of compiler warnings."

chrome/browser/gtk/view_id_util.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 CHROME_BROWSER_GTK_VIEW_ID_UTIL_H_
 #define CHROME_BROWSER_GTK_VIEW_ID_UTIL_H_
 
 #include "chrome/browser/view_ids.h"
 
 typedef struct _GtkWidget GtkWidget;
 
 class ViewIDUtil {
  public:
   // Use this delegate to override default view id searches.
   class Delegate {
    public:
     virtual GtkWidget* GetWidgetForViewID(ViewID id) = 0;
-   protected:
-    ~Delegate() {}
   };
 
   static void SetID(GtkWidget* widget, ViewID id);
 
   static GtkWidget* GetWidget(GtkWidget* root, ViewID id);
 
   static void SetDelegateForWidget(GtkWidget* widget, Delegate* delegate);
 };
 
 #endif  // CHROME_BROWSER_GTK_VIEW_ID_UTIL_H_