Convert //base to use std::unique_ptr

ios/chrome/browser/memory/memory_metrics.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 "ios/chrome/browser/memory/memory_metrics.h"
 
 #include <mach/mach.h>
 #include <stddef.h>
 #include <stdint.h>
 
 #include "base/logging.h"
 #include "base/mac/scoped_mach_port.h"
+#include "base/memory/scoped_ptr.h"
 #include "base/process/process_handle.h"
 #include "base/process/process_metrics.h"
 #include "build/build_config.h"
 
 #ifdef ARCH_CPU_64_BITS
 #define cr_vm_region vm_region_64
 #else
 #define cr_vm_region vm_region
 #endif
 
@@ skipping 61 matching lines @@
                 reinterpret_cast<task_info_t>(&task_vm_info), &count);
   if (result != KERN_SUCCESS) {
     LOG(ERROR) << "Calling task_info failed.";
     return 0;
   }
 
   return static_cast<uint64_t>(task_vm_info.internal);
 }
 
 }  // namespace memory_util