Convert //base to use std::unique_ptr

base/metrics/histogram_delta_serialization_unittest.cc

Index: base/metrics/histogram_delta_serialization_unittest.cc
diff --git a/base/metrics/histogram_delta_serialization_unittest.cc b/base/metrics/histogram_delta_serialization_unittest.cc
index 93f719826f3e7f207077ef65d1fbc7e84476aae5..80a70096716908312467e4fbcc94dacf859add23 100644
--- a/base/metrics/histogram_delta_serialization_unittest.cc
+++ b/base/metrics/histogram_delta_serialization_unittest.cc
@@ -34,7 +34,7 @@ TEST(HistogramDeltaSerializationTest, DeserializeHistogramAndAddSamples) {
   HistogramDeltaSerialization::DeserializeAndAddSamples(deltas);
 
   // The histogram has kIPCSerializationSourceFlag. So samples will be ignored.
-  scoped_ptr<HistogramSamples> snapshot(histogram->SnapshotSamples());
+  std::unique_ptr<HistogramSamples> snapshot(histogram->SnapshotSamples());
   EXPECT_EQ(1, snapshot->GetCount(1));
   EXPECT_EQ(1, snapshot->GetCount(10));
   EXPECT_EQ(1, snapshot->GetCount(100));
@@ -44,7 +44,7 @@ TEST(HistogramDeltaSerializationTest, DeserializeHistogramAndAddSamples) {
   histogram->ClearFlags(HistogramBase::kIPCSerializationSourceFlag);
   HistogramDeltaSerialization::DeserializeAndAddSamples(deltas);
 
-  scoped_ptr<HistogramSamples> snapshot2(histogram->SnapshotSamples());
+  std::unique_ptr<HistogramSamples> snapshot2(histogram->SnapshotSamples());
   EXPECT_EQ(2, snapshot2->GetCount(1));
   EXPECT_EQ(2, snapshot2->GetCount(10));
   EXPECT_EQ(2, snapshot2->GetCount(100));