Convert //base to use std::unique_ptr

base/metrics/sparse_histogram.h

 // 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.
 
 #ifndef BASE_METRICS_SPARSE_HISTOGRAM_H_
 #define BASE_METRICS_SPARSE_HISTOGRAM_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
 #include <map>
+#include <memory>
 #include <string>
 
 #include "base/base_export.h"
 #include "base/compiler_specific.h"
 #include "base/logging.h"
 #include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/metrics/histogram_base.h"
 #include "base/metrics/sample_map.h"
 #include "base/synchronization/lock.h"
 
 namespace base {
 
 // Sparse histograms are well suited for recording counts of exact sample values
 // that are sparsely distributed over a large range.
 //
 // The implementation uses a lock and a map, whereas other histogram types use a
@@ skipping 24 matching lines @@
 class HistogramSamples;
 class PersistentMemoryAllocator;
 
 class BASE_EXPORT SparseHistogram : public HistogramBase {
  public:
   // If there's one with same name, return the existing one. If not, create a
   // new one.
   static HistogramBase* FactoryGet(const std::string& name, int32_t flags);
 
   // Create a histogram using data in persistent storage.
-  static scoped_ptr<HistogramBase> PersistentCreate(
+  static std::unique_ptr<HistogramBase> PersistentCreate(
       PersistentMemoryAllocator* allocator,
       const std::string& name,
       HistogramSamples::Metadata* meta,
       HistogramSamples::Metadata* logged_meta);
 
   ~SparseHistogram() override;
 
   // HistogramBase implementation:
   uint64_t name_hash() const override;
   HistogramType GetHistogramType() const override;
   bool HasConstructionArguments(Sample expected_minimum,
                                 Sample expected_maximum,
                                 uint32_t expected_bucket_count) const override;
   void Add(Sample value) override;
   void AddCount(Sample value, int count) override;
   void AddSamples(const HistogramSamples& samples) override;
   bool AddSamplesFromPickle(base::PickleIterator* iter) override;
-  scoped_ptr<HistogramSamples> SnapshotSamples() const override;
-  scoped_ptr<HistogramSamples> SnapshotDelta() override;
+  std::unique_ptr<HistogramSamples> SnapshotSamples() const override;
+  std::unique_ptr<HistogramSamples> SnapshotDelta() override;
   void WriteHTMLGraph(std::string* output) const override;
   void WriteAscii(std::string* output) const override;
 
  protected:
   // HistogramBase implementation:
   bool SerializeInfoImpl(base::Pickle* pickle) const override;
 
  private:
   // Clients should always use FactoryGet to create SparseHistogram.
   explicit SparseHistogram(const std::string& name);
@@ skipping 20 matching lines @@
   // Write a common header message describing this histogram.
   void WriteAsciiHeader(const Count total_count,
                         std::string* output) const;
 
   // For constuctor calling.
   friend class SparseHistogramTest;
 
   // Protects access to |samples_|.
   mutable base::Lock lock_;
 
-  scoped_ptr<HistogramSamples> samples_;
-  scoped_ptr<HistogramSamples> logged_samples_;
+  std::unique_ptr<HistogramSamples> samples_;
+  std::unique_ptr<HistogramSamples> logged_samples_;
 
   DISALLOW_COPY_AND_ASSIGN(SparseHistogram);
 };
 
 }  // namespace base
 
 #endif  // BASE_METRICS_SPARSE_HISTOGRAM_H_