Convert //base to use std::unique_ptr

base/test/histogram_tester.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 "base/test/histogram_tester.h"
 
 #include <stddef.h>
 
 #include "base/metrics/histogram.h"
 #include "base/metrics/histogram_samples.h"
@@ skipping 25 matching lines @@
 void HistogramTester::ExpectUniqueSample(
     const std::string& name,
     base::HistogramBase::Sample sample,
     base::HistogramBase::Count expected_count) const {
   base::HistogramBase* histogram =
       base::StatisticsRecorder::FindHistogram(name);
   EXPECT_NE(static_cast<base::HistogramBase*>(NULL), histogram)
       << "Histogram \"" << name << "\" does not exist.";
 
   if (histogram) {
-    scoped_ptr<base::HistogramSamples> samples(histogram->SnapshotSamples());
+    std::unique_ptr<base::HistogramSamples> samples(
+        histogram->SnapshotSamples());
     CheckBucketCount(name, sample, expected_count, *samples);
     CheckTotalCount(name, expected_count, *samples);
   }
 }
 
 void HistogramTester::ExpectBucketCount(
     const std::string& name,
     base::HistogramBase::Sample sample,
     base::HistogramBase::Count expected_count) const {
   base::HistogramBase* histogram =
       base::StatisticsRecorder::FindHistogram(name);
   EXPECT_NE(static_cast<base::HistogramBase*>(NULL), histogram)
       << "Histogram \"" << name << "\" does not exist.";
 
   if (histogram) {
-    scoped_ptr<base::HistogramSamples> samples(histogram->SnapshotSamples());
+    std::unique_ptr<base::HistogramSamples> samples(
+        histogram->SnapshotSamples());
     CheckBucketCount(name, sample, expected_count, *samples);
   }
 }
 
 void HistogramTester::ExpectTotalCount(const std::string& name,
                                        base::HistogramBase::Count count) const {
   base::HistogramBase* histogram =
       base::StatisticsRecorder::FindHistogram(name);
   if (histogram) {
-    scoped_ptr<base::HistogramSamples> samples(histogram->SnapshotSamples());
+    std::unique_ptr<base::HistogramSamples> samples(
+        histogram->SnapshotSamples());
     CheckTotalCount(name, count, *samples);
   } else {
     // No histogram means there were zero samples.
     EXPECT_EQ(count, 0) << "Histogram \"" << name << "\" does not exist.";
   }
 }
 
 std::vector<Bucket> HistogramTester::GetAllSamples(
     const std::string& name) const {
   std::vector<Bucket> samples;
-  scoped_ptr<HistogramSamples> snapshot =
+  std::unique_ptr<HistogramSamples> snapshot =
       GetHistogramSamplesSinceCreation(name);
   if (snapshot) {
     for (auto it = snapshot->Iterator(); !it->Done(); it->Next()) {
       HistogramBase::Sample sample;
       HistogramBase::Count count;
       it->Get(&sample, nullptr, &count);
       samples.push_back(Bucket(sample, count));
     }
   }
   return samples;
 }
 
 HistogramTester::CountsMap HistogramTester::GetTotalCountsForPrefix(
     const std::string& query) const {
   EXPECT_TRUE(query.find('.') != std::string::npos)
       << "|query| ought to contain at least one period, to avoid matching too"
       << " many histograms.";
 
   // Find matches by using the prefix-matching logic built into GetSnapshot().
   StatisticsRecorder::Histograms query_matches;
   StatisticsRecorder::GetSnapshot(query, &query_matches);
 
   CountsMap result;
   for (base::HistogramBase* histogram : query_matches) {
-    scoped_ptr<HistogramSamples> new_samples =
+    std::unique_ptr<HistogramSamples> new_samples =
         GetHistogramSamplesSinceCreation(histogram->histogram_name());
     // Omit unchanged histograms from the result.
     if (new_samples->TotalCount()) {
       result[histogram->histogram_name()] = new_samples->TotalCount();
     }
   }
   return result;
 }
 
-scoped_ptr<HistogramSamples> HistogramTester::GetHistogramSamplesSinceCreation(
+std::unique_ptr<HistogramSamples>
+HistogramTester::GetHistogramSamplesSinceCreation(
     const std::string& histogram_name) const {
   HistogramBase* histogram = StatisticsRecorder::FindHistogram(histogram_name);
   // Whether the histogram exists or not may not depend on the current test
   // calling this method, but rather on which tests ran before and possibly
   // generated a histogram or not (see http://crbug.com/473689). To provide a
   // response which is independent of the previously run tests, this method
   // creates empty samples in the absence of the histogram, rather than
   // returning null.
   if (!histogram) {
-    return scoped_ptr<HistogramSamples>(
+    return std::unique_ptr<HistogramSamples>(
         new SampleMap(HashMetricName(histogram_name)));
   }
-  scoped_ptr<HistogramSamples> named_samples(histogram->SnapshotSamples());
+  std::unique_ptr<HistogramSamples> named_samples(histogram->SnapshotSamples());
   auto original_samples_it = histograms_snapshot_.find(histogram_name);
   if (original_samples_it != histograms_snapshot_.end())
     named_samples->Subtract(*original_samples_it->second);
   return named_samples;
 }
 
 void HistogramTester::CheckBucketCount(
     const std::string& name,
     base::HistogramBase::Sample sample,
     base::HistogramBase::Count expected_count,
@@ skipping 29 matching lines @@
 
 bool Bucket::operator==(const Bucket& other) const {
   return min == other.min && count == other.count;
 }
 
 void PrintTo(const Bucket& bucket, std::ostream* os) {
   *os << "Bucket " << bucket.min << ": " << bucket.count;
 }
 
 }  // namespace base