Virtual destructors should have virtual keyword.

content/browser/in_process_webkit/dom_storage_message_filter.h

 // Copyright (c) 2011 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 CONTENT_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_MESSAGE_FILTER_H_
 #define CONTENT_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_MESSAGE_FILTER_H_
 #pragma once
 
 #include "base/memory/ref_counted.h"
 #include "base/process.h"
@@ skipping 24 matching lines @@
   virtual void OnDestruct() const;
 
   // Only call on the WebKit thread.
   static void DispatchStorageEvent(const NullableString16& key,
       const NullableString16& old_value, const NullableString16& new_value,
       const string16& origin, const GURL& url, bool is_local_storage);
 
  private:
   friend class BrowserThread;
   friend class DeleteTask<DOMStorageMessageFilter>;
-  ~DOMStorageMessageFilter();
+  virtual ~DOMStorageMessageFilter();
 
   // Message Handlers.
   void OnStorageAreaId(int64 namespace_id, const string16& origin,
                        int64* storage_area_id);
   void OnLength(int64 storage_area_id, unsigned* length);
   void OnKey(int64 storage_area_id, unsigned index, NullableString16* key);
   void OnGetItem(int64 storage_area_id, const string16& key,
                  NullableString16* value);
   void OnSetItem(int render_view_id, int64 storage_area_id, const string16& key,
                  const string16& value, const GURL& url,
@@ skipping 27 matching lines @@
   // Data shared between renderer processes with the same profile.
   scoped_refptr<WebKitContext> webkit_context_;
 
   // Used to dispatch messages to the correct view host.
   int process_id_;
 
   DISALLOW_IMPLICIT_CONSTRUCTORS(DOMStorageMessageFilter);
 };
 
 #endif  // CONTENT_BROWSER_IN_PROCESS_WEBKIT_DOM_STORAGE_MESSAGE_FILTER_H_