Added check for null delegate when a socket stream closes between DoResolveHo...

net/socket_stream/socket_stream.cc

 // Copyright (c) 2010 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.
 //
 // TODO(ukai): code is similar with http_network_transaction.cc.  We should
 //   think about ways to share code, if possible.
 
 #include "net/socket_stream/socket_stream.h"
 
 #include <set>
@@ skipping 511 matching lines @@
 
   HostResolver::RequestInfo resolve_info(host, port);
 
   DCHECK(host_resolver_.get());
   resolver_.reset(new SingleRequestHostResolver(host_resolver_.get()));
   return resolver_->Resolve(resolve_info, &addresses_, &io_callback_,
                             net_log_);
 }
 
 int SocketStream::DoResolveHostComplete(int result) {
-  if (result == OK) {
+  if (result == OK && delegate_) {
     next_state_ = STATE_TCP_CONNECT;
     result = delegate_->OnStartOpenConnection(this, &io_callback_);
     if (result == net::ERR_IO_PENDING)
       metrics_->OnWaitConnection();
   } else {
     next_state_ = STATE_CLOSE;
   }
   // TODO(ukai): if error occured, reconsider proxy after error.
   return result;
 }
@@ skipping 476 matching lines @@
 
 SSLConfigService* SocketStream::ssl_config_service() const {
   return context_->ssl_config_service();
 }
 
 ProxyService* SocketStream::proxy_service() const {
   return context_->proxy_service();
 }
 
 }  // namespace net