[Cast Channel] Fix "leaky" CastChannelOpenFunction.

extensions/browser/api/cast_channel/cast_socket.cc

 // Copyright 2014 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 "extensions/browser/api/cast_channel/cast_socket.h"
 
 #include <stdlib.h>
 #include <string.h>
 
 #include <utility>
@@ skipping 118 matching lines @@
       connect_state_(proto::CONN_STATE_START_CONNECT),
       error_state_(CHANNEL_ERROR_NONE),
       ready_state_(READY_STATE_NONE),
       auth_delegate_(nullptr) {
   DCHECK(net_log_);
   net_log_source_.type = net::NetLogSourceType::SOCKET;
   net_log_source_.id = net_log_->NextID();
 }
 
 CastSocketImpl::~CastSocketImpl() {
-  // Ensure that resources are freed but do not run pending callbacks to avoid
-  // any re-entrancy.
+  // Ensure that resources are freed but do not run pending callbacks that
+  // would result in re-entrancy.
   CloseInternal();
+
+  if (!connect_callback_.is_null())
+    base::ResetAndReturn(&connect_callback_).Run(CHANNEL_ERROR_UNKNOWN);
 }
 
 ReadyState CastSocketImpl::ready_state() const {
   return ready_state_;
 }
 
 ChannelError CastSocketImpl::error_state() const {
   return error_state_;
 }
 
@@ skipping 444 matching lines @@
 void CastSocketImpl::SetErrorState(ChannelError error_state) {
   VLOG_WITH_CONNECTION(1) << "SetErrorState " << error_state;
   DCHECK_EQ(CHANNEL_ERROR_NONE, error_state_);
   error_state_ = error_state;
   delegate_->OnError(error_state_);
 }
 }  // namespace cast_channel
 }  // namespace api
 }  // namespace extensions
 #undef VLOG_WITH_CONNECTION