mac: Remove some 10.6-SDK-only sandbox code.

sandbox/mac/xpc_message_server.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 "sandbox/mac/xpc_message_server.h"
 
 #include <bsm/libbsm.h>
 
 #include <string>
 
 #include "base/mac/mach_logging.h"
 #include "base/strings/stringprintf.h"
 #include "sandbox/mac/xpc.h"
 
 namespace sandbox {
 
 XPCMessageServer::XPCMessageServer(MessageDemuxer* demuxer,
                                    mach_port_t server_receive_right)
     : demuxer_(demuxer),
       server_port_(server_receive_right),
-      reply_message_(NULL) {
-  CHECK(InitializeXPC());
-}
+      reply_message_(NULL) {}
 
 XPCMessageServer::~XPCMessageServer() {
 }
 
 bool XPCMessageServer::Initialize() {
   // Allocate a port for use as a new server port if one was not passed to the
   // constructor.
   if (!server_port_.is_valid()) {
     mach_port_t port;
     kern_return_t kr;
@@ skipping 83 matching lines @@
   demuxer_->DemuxMessage(request);
 
   xpc_release(request.xpc);
   if (reply_message_) {
     xpc_release(reply_message_);
     reply_message_ = NULL;
   }
 }
 
 }  // namespace sandbox