Convert //base to use std::unique_ptr

base/metrics/persistent_sample_map.cc

 // Copyright 2016 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/persistent_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 PersistentSampleMap. The logic here is
@@ skipping 110 matching lines @@
   // loaded before trying to iterate over the map.
   const_cast<PersistentSampleMap*>(this)->ImportSamples(kAllSamples);
 
   Count count = 0;
   for (const auto& entry : sample_counts_) {
     count += *entry.second;
   }
   return count;
 }
 
-scoped_ptr<SampleCountIterator> PersistentSampleMap::Iterator() const {
+std::unique_ptr<SampleCountIterator> PersistentSampleMap::Iterator() const {
   // Have to override "const" in order to make sure all samples have been
   // loaded before trying to iterate over the map.
   const_cast<PersistentSampleMap*>(this)->ImportSamples(kAllSamples);
-  return make_scoped_ptr(new PersistentSampleMapIterator(sample_counts_));
+  return base::WrapUnique(new PersistentSampleMapIterator(sample_counts_));
 }
 
 bool PersistentSampleMap::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)
@@ skipping 105 matching lines @@
       // Stop if it's the value being searched for.
       if (record->value == until_value)
         return &record->count;
     }
   }
 
   return nullptr;
 }
 
 }  // namespace base