Virtual destructors should have virtual keyword.

content/browser/renderer_host/quota_dispatcher_host.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_RENDERER_HOST_QUOTA_DISPATCHER_HOST_H_
 #define CONTENT_BROWSER_RENDERER_HOST_QUOTA_DISPATCHER_HOST_H_
 
 #include "base/basictypes.h"
 #include "base/id_map.h"
 #include "content/browser/browser_message_filter.h"
 #include "third_party/WebKit/Source/WebKit/chromium/public/WebStorageQuotaType.h"
 
 class GURL;
 
 namespace IPC {
 class Message;
 }
 
 namespace quota {
 class QuotaManager;
 }
 
 class QuotaDispatcherHost : public BrowserMessageFilter {
  public:
   QuotaDispatcherHost(quota::QuotaManager* quota_manager);
-  ~QuotaDispatcherHost();
+  virtual ~QuotaDispatcherHost();
   virtual bool OnMessageReceived(const IPC::Message& message,
                                  bool* message_was_ok);
 
  private:
   void OnQueryStorageUsageAndQuota(
       int request_id,
       const GURL& origin_url,
       WebKit::WebStorageQuotaType type);
   void OnRequestStorageQuota(
       int request_id,
       const GURL& origin_url,
       WebKit::WebStorageQuotaType type,
       int64 requested_size);
 
   quota::QuotaManager* quota_manager_;
 
   class RequestDispatcher;
   IDMap<RequestDispatcher, IDMapOwnPointer> outstanding_requests_;
 };
 
 #endif  // CONTENT_BROWSER_RENDERER_HOST_QUOTA_DISPATCHER_HOST_H_