Convert //base to use std::unique_ptr

base/test/histogram_tester_unittest.cc

Index: base/test/histogram_tester_unittest.cc
diff --git a/base/test/histogram_tester_unittest.cc b/base/test/histogram_tester_unittest.cc
index 21b81703c648c28d317dde656f83d7c191bd6081..c4d49af942f783a571b270a591c5b2faaee85e03 100644
--- a/base/test/histogram_tester_unittest.cc
+++ b/base/test/histogram_tester_unittest.cc
@@ -4,7 +4,8 @@
 
 #include "base/test/histogram_tester.h"
 
-#include "base/memory/scoped_ptr.h"
+#include <memory>
+
 #include "base/metrics/histogram_macros.h"
 #include "base/metrics/histogram_samples.h"
 #include "testing/gmock/include/gmock/gmock.h"
@@ -40,7 +41,7 @@ TEST_F(HistogramTesterTest, Scope) {
   UMA_HISTOGRAM_BOOLEAN(kHistogram1, true);
 
   // Verify that one histogram is recorded.
-  scoped_ptr<HistogramSamples> samples(
+  std::unique_ptr<HistogramSamples> samples(
       tester.GetHistogramSamplesSinceCreation(kHistogram1));
   EXPECT_TRUE(samples);
   EXPECT_EQ(1, samples->TotalCount());
@@ -54,7 +55,7 @@ TEST_F(HistogramTesterTest, GetHistogramSamplesSinceCreationNotNull) {
   HistogramTester tester;
 
   // Verify that the returned samples are empty but not null.
-  scoped_ptr<HistogramSamples> samples(
+  std::unique_ptr<HistogramSamples> samples(
       tester.GetHistogramSamplesSinceCreation(kHistogram1));
   EXPECT_TRUE(samples);
   tester.ExpectTotalCount(kHistogram, 0);