Fix a compilation error with 10.11 SDK.

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 <stddef.h>
@@ skipping 32 matching lines @@
   mach_vm_size_t reusable;
   mach_vm_size_t reusable_peak;
   mach_vm_size_t purgeable_volatile_pmap;
   mach_vm_size_t purgeable_volatile_resident;
   mach_vm_size_t purgeable_volatile_virtual;
   mach_vm_size_t compressed;
   mach_vm_size_t compressed_peak;
   mach_vm_size_t compressed_lifetime;
   mach_vm_size_t phys_footprint;
 };
+#else
+using ChromeTaskVMInfo = task_vm_info;
+#endif  // MAC_OS_X_VERSION_10_11
 mach_msg_type_number_t ChromeTaskVMInfoCount =
     sizeof(ChromeTaskVMInfo) / sizeof(natural_t);
-#else
-using ChromeTaskVMInfo = task_vm_info;
-mach_msg_type_number_t ChromeTaskVMInfoCount = TASK_VM_INFO_REV1_COUNT;
-#endif  // MAC_OS_X_VERSION_10_11
 
 bool GetTaskInfo(mach_port_t task, task_basic_info_64* task_info_data) {
   if (task == MACH_PORT_NULL)
     return false;
   mach_msg_type_number_t count = TASK_BASIC_INFO_64_COUNT;
   kern_return_t kr = task_info(task,
                                TASK_BASIC_INFO_64,
                                reinterpret_cast<task_info_t>(task_info_data),
                                &count);
   // Most likely cause for failure: |task| is a zombie.
@@ skipping 427 matching lines @@
       task, address, size, VM_REGION_BASIC_INFO_64,
       reinterpret_cast<vm_region_info_t>(info), &info_count, &object_name);
   // The kernel always returns a null object for VM_REGION_BASIC_INFO_64, but
   // balance it with a deallocate in case this ever changes. See 10.9.2
   // xnu-2422.90.20/osfmk/vm/vm_map.c vm_map_region.
   mach_port_deallocate(task, object_name);
   return ParseOutputFromMachVMRegion(kr);
 }
 
 }  // namespace base