Convert //base to use std::unique_ptr

base/metrics/sample_map.cc

 // Copyright (c) 2012 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/metrics/sample_map.h"
 
 #include "base/logging.h"
+#include "base/memory/ptr_util.h"
 #include "base/stl_util.h"
 
 namespace base {
 
 typedef HistogramBase::Count Count;
 typedef HistogramBase::Sample Sample;
 
 namespace {
 
 // An iterator for going through a SampleMap. The logic here is identical
@@ skipping 77 matching lines @@
 }
 
 Count SampleMap::TotalCount() const {
   Count count = 0;
   for (const auto& entry : sample_counts_) {
     count += entry.second;
   }
   return count;
 }
 
-scoped_ptr<SampleCountIterator> SampleMap::Iterator() const {
-  return make_scoped_ptr(new SampleMapIterator(sample_counts_));
+std::unique_ptr<SampleCountIterator> SampleMap::Iterator() const {
+  return base::WrapUnique(new SampleMapIterator(sample_counts_));
 }
 
 bool SampleMap::AddSubtractImpl(SampleCountIterator* iter, Operator op) {
   Sample min;
   Sample max;
   Count count;
   for (; !iter->Done(); iter->Next()) {
     iter->Get(&min, &max, &count);
     if (min + 1 != max)
       return false;  // SparseHistogram only supports bucket with size 1.
 
     sample_counts_[min] += (op == HistogramSamples::ADD) ? count : -count;
   }
   return true;
 }
 
 }  // namespace base