Shutdown the sandbox MessageServer before deleting it.

sandbox/mac/mach_message_server.h

 // 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.
 
 #ifndef SANDBOX_MAC_MACH_MESSAGE_SERVER_H_
 #define SANDBOX_MAC_MACH_MESSAGE_SERVER_H_
 
 #include <mach/mach.h>
 #include <stddef.h>
 
@@ skipping 16 matching lines @@
   // take ownership of the port and it will be used to receive messages.
   // Otherwise the server will create a new receive right.
   // The maximum size of messages is specified by |buffer_size|.
   MachMessageServer(MessageDemuxer* demuxer,
                     mach_port_t server_receive_right,
                     mach_msg_size_t buffer_size);
   ~MachMessageServer() override;
 
   // MessageServer:
   bool Initialize() override;
+  void Shutdown() override;
   pid_t GetMessageSenderPID(IPCMessage request) override;
   IPCMessage CreateReply(IPCMessage request) override;
   bool SendReply(IPCMessage reply) override;
   void ForwardMessage(IPCMessage request, mach_port_t destination) override;
   // Replies to the message with the specified |error_code| as a MIG
   // error_reply RetCode.
   void RejectMessage(IPCMessage request, int error_code) override;
   mach_port_t GetServerPort() const override;
 
  private:
@@ skipping 17 matching lines @@
   // MACH_RECV dispatch source that handles the |server_port_|.
   scoped_ptr<base::DispatchSourceMach> dispatch_source_;
 
   // Whether or not ForwardMessage() was called during ReceiveMessage().
   bool did_forward_message_;
 };
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_MAC_MACH_MESSAGE_SERVER_H_