Convert //chrome/browser/extensions from scoped_ptr to std::unique_ptr

chrome/browser/extensions/api/metrics_private/metrics_apitest.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 <stddef.h>
 
 #include <map>
 
 #include "base/macros.h"
 #include "base/metrics/field_trial.h"
@@ skipping 89 matching lines @@
   // Code other than the tests tun here will record some histogram values, but
   // we will ignore those. This function validates that all the histogram we
   // expect to see are present in the list, and that their basic info is
   // correct.
   for (int i = 0; i < count; ++i) {
     const RecordedHistogram& r = recorded[i];
     size_t j = 0;
     for (j = 0; j < histograms.size(); ++j) {
       base::HistogramBase* histogram(histograms[j]);
       if (r.name == histogram->histogram_name()) {
-        scoped_ptr<base::HistogramSamples> snapshot =
+        std::unique_ptr<base::HistogramSamples> snapshot =
             histogram->SnapshotSamples();
         base::HistogramBase::Count sample_count = snapshot->TotalCount();
         EXPECT_EQ(r.count, sample_count);
 
         EXPECT_EQ(r.type, histogram->GetHistogramType());
         if (r.type == base::SPARSE_HISTOGRAM) {
           ValidateSparseHistogramSamples(r.name, *snapshot);
         } else {
           EXPECT_TRUE(
               histogram->HasConstructionArguments(r.min, r.max, r.buckets));
@@ skipping 17 matching lines @@
   params["b"] = "bb";
   ASSERT_TRUE(variations::AssociateVariationParams(
       "apitestfieldtrial2", "group1", params));
 
   ASSERT_TRUE(RunComponentExtensionTest("metrics")) << message_;
 
   ValidateUserActions(user_action_tester, g_user_actions,
                       arraysize(g_user_actions));
   ValidateHistograms(g_histograms, arraysize(g_histograms));
 }