Virtual destructors should have virtual keyword.

net/socket_stream/socket_stream.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 NET_SOCKET_STREAM_SOCKET_STREAM_H_
 #define NET_SOCKET_STREAM_SOCKET_STREAM_H_
 #pragma once
 
 #include <deque>
 #include <map>
@@ skipping 171 matching lines @@
    public:
     RequestHeaders() : IOBuffer() {}
 
     void SetDataOffset(size_t offset) {
       data_ = const_cast<char*>(headers_.data()) + offset;
     }
 
     std::string headers_;
 
     private:
-     ~RequestHeaders() { data_ = NULL; }
+     virtual ~RequestHeaders() { data_ = NULL; }
   };
 
   class ResponseHeaders : public IOBuffer {
    public:
     ResponseHeaders();
 
     void SetDataOffset(size_t offset) { data_ = headers_.get() + offset; }
     char* headers() const { return headers_.get(); }
     void Reset() { headers_.reset(); }
     void Realloc(size_t new_size);
 
    private:
-     ~ResponseHeaders();
+     virtual ~ResponseHeaders();
 
     scoped_ptr_malloc<char> headers_;
   };
 
   enum State {
     STATE_NONE,
     STATE_RESOLVE_PROXY,
     STATE_RESOLVE_PROXY_COMPLETE,
     STATE_RESOLVE_HOST,
     STATE_RESOLVE_HOST_COMPLETE,
@@ skipping 128 matching lines @@
   bool server_closed_;
 
   scoped_ptr<SocketStreamMetrics> metrics_;
 
   DISALLOW_COPY_AND_ASSIGN(SocketStream);
 };
 
 }  // namespace net
 
 #endif  // NET_SOCKET_STREAM_SOCKET_STREAM_H_