Virtual destructors should have virtual keyword.

net/tools/flip_server/acceptor_thread.h

 // Copyright (c) 2009 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 NET_TOOLS_FLIP_SERVER_ACCEPTOR_THREAD_H_
 #define NET_TOOLS_FLIP_SERVER_ACCEPTOR_THREAD_H_
 
 #include <list>
 #include <string>
 #include <vector>
@@ skipping 28 matching lines @@
    }
    bool value_;
    base::Lock lock_;
 };
 
 class SMAcceptorThread : public base::SimpleThread,
                          public EpollCallbackInterface,
                          public SMConnectionPoolInterface {
  public:
   SMAcceptorThread(FlipAcceptor *acceptor, MemoryCache* memory_cache);
-  ~SMAcceptorThread();
+  virtual ~SMAcceptorThread();
 
   // EpollCallbackInteface interface
   virtual void OnRegistration(EpollServer* eps, int fd, int event_mask) {}
   virtual void OnModification(int fd, int event_mask) {}
   virtual void OnEvent(int fd, EpollEvent* event);
   virtual void OnUnregistration(int fd, bool replaced) {}
   virtual void OnShutdown(EpollServer* eps, int fd) {}
 
   // SMConnectionPool interface
   virtual void SMConnectionDone(SMConnection* sc);
@@ skipping 25 matching lines @@
   std::vector<SMConnection*> tmp_unused_server_connections_;
   std::vector<SMConnection*> allocated_server_connections_;
   std::list<SMConnection*> active_server_connections_;
   Notification quitting_;
   MemoryCache* memory_cache_;
 };
 
 }  // namespace net
 
 #endif  // NET_TOOLS_FLIP_SERVER_ACCEPTOR_THREAD_H_
-