Use automatic memory management for URLRequestContext's members....

net/http/http_transaction_winhttp.cc

 // Copyright (c) 2006-2008 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.
 
 #include "net/http/http_transaction_winhttp.h"
 
 #include <winhttp.h>
 
 #include "base/lock.h"
 #include "base/memory_debug.h"
@@ skipping 222 matching lines @@
 
   HINTERNET OpenWinHttpSession(const std::string& user_agent);
 
   // Get the SSL configuration settings and save them in rev_checking_enabled_
   // and secure_protocols_.
   void GetSSLConfig();
 
   HINTERNET internet_;
   HINTERNET internet_no_tls_;
   MessageLoop* message_loop_;
-  ProxyService* proxy_service_;
+  scoped_refptr<ProxyService> proxy_service_;
   AuthCache auth_cache_;
 
   // This event object is used when destroying a transaction.  It is given
   // to the transaction's session callback if WinHTTP still has the caller's
   // data (request info or read buffer) and we need to wait until WinHTTP is
   // done with the data.
   HANDLE handle_closing_event_;
 
   // The following members ensure a clean destruction of the Session object.
   // The Session destructor waits until all the request handles have been
@@ skipping 1563 matching lines @@
 
   if (rv == ERR_IO_PENDING) {
     session_callback_->AddRef();  // balanced when callback runs.
   } else if (callback_) {
     DoCallback(rv);
   }
 }
 
 }  // namespace net