Virtual destructors should have virtual keyword.

chrome/browser/nacl_host/nacl_process_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 CHROME_BROWSER_NACL_HOST_NACL_PROCESS_HOST_H_
 #define CHROME_BROWSER_NACL_HOST_NACL_PROCESS_HOST_H_
 #pragma once
 
 #include "build/build_config.h"
 
 #include "base/file_path.h"
 #include "base/file_util_proxy.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_callback_factory.h"
 #include "chrome/common/nacl_types.h"
 #include "content/browser/browser_child_process_host.h"
 
 class ChromeRenderMessageFilter;
 
 // Represents the browser side of the browser <--> NaCl communication
 // channel. There will be one NaClProcessHost per NaCl process
 // The browser is responsible for starting the NaCl process
 // when requested by the renderer.
 // After that, most of the communication is directly between NaCl plugin
 // running in the renderer and NaCl processes.
 class NaClProcessHost : public BrowserChildProcessHost {
  public:
   explicit NaClProcessHost(const std::wstring& url);
-  ~NaClProcessHost();
+  virtual ~NaClProcessHost();
 
   // Initialize the new NaCl process, returning true on success.
   bool Launch(ChromeRenderMessageFilter* chrome_render_message_filter,
               int socket_count,
               IPC::Message* reply_msg);
 
   virtual bool OnMessageReceived(const IPC::Message& msg);
 
   void OnProcessLaunchedByBroker(base::ProcessHandle handle);
 
@@ skipping 35 matching lines @@
 
   // Windows platform flag
   bool running_on_wow64_;
 
   base::ScopedCallbackFactory<NaClProcessHost> callback_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(NaClProcessHost);
 };
 
 #endif  // CHROME_BROWSER_NACL_HOST_NACL_PROCESS_HOST_H_