mac: Make Mach port scopers better ScopedGenerics

base/process/process_metrics_mac.cc

 // Copyright (c) 2013 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 "base/process/process_metrics.h"
 
 #include <mach/mach.h>
 #include <mach/mach_vm.h>
 #include <mach/shared_region.h>
 #include <sys/sysctl.h>
@@ skipping 334 matching lines @@
   if (task == MACH_PORT_NULL && process_ == getpid())
     task = mach_task_self();
   return task;
 }
 
 // Bytes committed by the system.
 size_t GetSystemCommitCharge() {
   base::mac::ScopedMachSendRight host(mach_host_self());
   mach_msg_type_number_t count = HOST_VM_INFO_COUNT;
   vm_statistics_data_t data;
-  kern_return_t kr = host_statistics(host, HOST_VM_INFO,
+  kern_return_t kr = host_statistics(host.get(), HOST_VM_INFO,
                                      reinterpret_cast<host_info_t>(&data),
                                      &count);
   if (kr != KERN_SUCCESS) {
     MACH_DLOG(WARNING, kr) << "host_statistics";
     return 0;
   }
 
   return (data.active_count * PAGE_SIZE) / 1024;
 }
 
 // On Mac, We only get total memory and free memory from the system.
 bool GetSystemMemoryInfo(SystemMemoryInfoKB* meminfo) {
   struct host_basic_info hostinfo;
   mach_msg_type_number_t count = HOST_BASIC_INFO_COUNT;
   base::mac::ScopedMachSendRight host(mach_host_self());
-  int result = host_info(host, HOST_BASIC_INFO,
+  int result = host_info(host.get(), HOST_BASIC_INFO,
                          reinterpret_cast<host_info_t>(&hostinfo), &count);
   if (result != KERN_SUCCESS)
     return false;
 
   DCHECK_EQ(HOST_BASIC_INFO_COUNT, count);
   meminfo->total = static_cast<int>(hostinfo.max_mem / 1024);
 
   vm_statistics_data_t vm_info;
   count = HOST_VM_INFO_COUNT;
 
   if (host_statistics(host.get(), HOST_VM_INFO,
                       reinterpret_cast<host_info_t>(&vm_info),
                       &count) != KERN_SUCCESS) {
     return false;
   }
 
   meminfo->free = static_cast<int>(
       (vm_info.free_count - vm_info.speculative_count) * PAGE_SIZE / 1024);
 
   return true;
 }
 
 }  // namespace base