Virtual destructors should have virtual keyword.

content/renderer/indexed_db_dispatcher.h

 // Copyright (c) 2010 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_RENDERER_INDEXED_DB_DISPATCHER_H_
 #define CONTENT_RENDERER_INDEXED_DB_DISPATCHER_H_
 #pragma once
 
 #include "base/id_map.h"
 #include "base/nullable_string16.h"
@@ skipping 10 matching lines @@
 namespace WebKit {
 class WebFrame;
 class WebIDBKeyRange;
 class WebIDBTransaction;
 }
 
 // Handle the indexed db related communication for this entire renderer.
 class IndexedDBDispatcher : public IPC::Channel::Listener {
  public:
   IndexedDBDispatcher();
-  ~IndexedDBDispatcher();
+  virtual ~IndexedDBDispatcher();
 
   // IPC::Channel::Listener implementation.
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
   void RequestIDBFactoryOpen(
       const string16& name,
       WebKit::WebIDBCallbacks* callbacks,
       const string16& origin,
       WebKit::WebFrame* web_frame,
       uint64 maximum_size);
@@ skipping 125 matching lines @@
   IDMap<WebKit::WebIDBCallbacks, IDMapOwnPointer> pending_callbacks_;
   IDMap<WebKit::WebIDBTransactionCallbacks, IDMapOwnPointer>
       pending_transaction_callbacks_;
   IDMap<WebKit::WebIDBDatabaseCallbacks, IDMapOwnPointer>
       pending_database_callbacks_;
 
   DISALLOW_COPY_AND_ASSIGN(IndexedDBDispatcher);
 };
 
 #endif  // CONTENT_RENDERER_INDEXED_DB_DISPATCHER_H_