Virtual destructors should have virtual keyword.

chrome/browser/profiles/off_the_record_profile_io_data.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 CHROME_BROWSER_PROFILES_OFF_THE_RECORD_PROFILE_IO_DATA_H_
 #define CHROME_BROWSER_PROFILES_OFF_THE_RECORD_PROFILE_IO_DATA_H_
 #pragma once
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
@@ skipping 67 matching lines @@
     DISALLOW_COPY_AND_ASSIGN(Handle);
   };
 
  private:
   friend class base::RefCountedThreadSafe<OffTheRecordProfileIOData>;
 
   typedef base::hash_map<std::string, net::HttpTransactionFactory* >
       HttpTransactionFactoryMap;
 
   OffTheRecordProfileIOData();
-  ~OffTheRecordProfileIOData();
+  virtual ~OffTheRecordProfileIOData();
 
   virtual void LazyInitializeInternal(ProfileParams* profile_params) const;
   virtual scoped_refptr<RequestContext> InitializeAppRequestContext(
       scoped_refptr<ChromeURLRequestContext> main_context,
       const std::string& app_id) const;
   virtual scoped_refptr<ChromeURLRequestContext>
       AcquireMediaRequestContext() const;
   virtual scoped_refptr<ChromeURLRequestContext>
       AcquireIsolatedAppRequestContext(
           scoped_refptr<ChromeURLRequestContext> main_context,
           const std::string& app_id) const;
 
   mutable scoped_ptr<net::HttpTransactionFactory> main_http_factory_;
 
   // One HttpTransactionFactory per isolated app.
   mutable HttpTransactionFactoryMap app_http_factory_map_;
 
   DISALLOW_COPY_AND_ASSIGN(OffTheRecordProfileIOData);
 };
 
 #endif  // CHROME_BROWSER_PROFILES_OFF_THE_RECORD_PROFILE_IO_DATA_H_