Shutdown the sandbox MessageServer before deleting it.

sandbox/mac/xpc_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_XPC_MESSAGE_SERVER_H_
 #define SANDBOX_MAC_XPC_MESSAGE_SERVER_H_
 
 #include <AvailabilityMacros.h>
 
 #include "base/mac/dispatch_source_mach.h"
@@ skipping 13 matching lines @@
   // Creates a new XPC message server that will send messages to |demuxer|
   // for handling. If the |server_receive_right| is non-NULL, this class will
   // take ownership of the port and it will be used to receive messages.
   // Otherwise the server will create a new receive right on which to listen.
   XPCMessageServer(MessageDemuxer* demuxer,
                    mach_port_t server_receive_right);
   ~XPCMessageServer() 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;
   // Creates an error reply message with a field "error" set to |error_code|.
   void RejectMessage(IPCMessage request, int error_code) override;
   mach_port_t GetServerPort() const override;
 
  private:
   // Reads a message from the XPC pipe.
@@ skipping 10 matching lines @@
 
   // The reply message, if one has been created.
   xpc_object_t reply_message_;
 
   DISALLOW_COPY_AND_ASSIGN(XPCMessageServer);
 };
 
 }  // namespace sandbox
 
 #endif  // SANDBOX_MAC_XPC_MESSAGE_SERVER_H_