Convert //base to use std::unique_ptr

base/process/process_metrics_unittest_ios.cc

 // Copyright 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 "base/memory/scoped_ptr.h"
+#include <memory>
+
 #include "testing/gtest/include/gtest/gtest.h"
 
 TEST(ProcessMetricsTestIos, Memory) {
-  scoped_ptr<base::ProcessMetrics> process_metrics(
+  std::unique_ptr<base::ProcessMetrics> process_metrics(
       base::ProcessMetrics::CreateProcessMetrics(
           base::GetCurrentProcessHandle()));
 
   ASSERT_NE(0u, process_metrics->GetWorkingSetSize());
 }