Convert //components/metrics from scoped_ptr to std::unique_ptr

components/metrics/serialization/serialization_utils.cc

Index: components/metrics/serialization/serialization_utils.cc
diff --git a/components/metrics/serialization/serialization_utils.cc b/components/metrics/serialization/serialization_utils.cc
index 0038b4b2006223eac6d3aecf12bd73a0eef858a3..8aa16322685ba671be7d7fcfe1bc977ae0bd13a8 100644
--- a/components/metrics/serialization/serialization_utils.cc
+++ b/components/metrics/serialization/serialization_utils.cc
@@ -7,6 +7,8 @@
 #include <errno.h>
 #include <stdint.h>
 #include <sys/file.h>
+
+#include <memory>
 #include <string>
 #include <utility>
 #include <vector>
@@ -15,7 +17,6 @@
 #include "base/files/file_util.h"
 #include "base/files/scoped_file.h"
 #include "base/logging.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/scoped_vector.h"
 #include "base/strings/string_split.h"
 #include "base/strings/string_util.h"
@@ -88,10 +89,10 @@ bool ReadMessage(int fd, std::string* message) {
 
 }  // namespace
 
-scoped_ptr<MetricSample> SerializationUtils::ParseSample(
+std::unique_ptr<MetricSample> SerializationUtils::ParseSample(
     const std::string& sample) {
   if (sample.empty())
-    return scoped_ptr<MetricSample>();
+    return std::unique_ptr<MetricSample>();
 
   std::vector<std::string> parts = base::SplitString(
       sample, std::string(1, '\0'),
@@ -101,7 +102,7 @@ scoped_ptr<MetricSample> SerializationUtils::ParseSample(
   if (parts.size() != 3) {
     DLOG(ERROR) << "splitting message on \\0 produced " << parts.size()
                 << " parts (expected 3)";
-    return scoped_ptr<MetricSample>();
+    return std::unique_ptr<MetricSample>();
   }
   const std::string& name = parts[0];
   const std::string& value = parts[1];
@@ -119,7 +120,7 @@ scoped_ptr<MetricSample> SerializationUtils::ParseSample(
   } else {
     DLOG(ERROR) << "invalid event type: " << name << ", value: " << value;
   }
-  return scoped_ptr<MetricSample>();
+  return std::unique_ptr<MetricSample>();
 }
 
 void SerializationUtils::ReadAndTruncateMetricsFromFile(
@@ -159,7 +160,7 @@ void SerializationUtils::ReadAndTruncateMetricsFromFile(
     if (!ReadMessage(fd.get(), &message))
       break;
 
-    scoped_ptr<MetricSample> sample = ParseSample(message);
+    std::unique_ptr<MetricSample> sample = ParseSample(message);
     if (sample)
       metrics->push_back(std::move(sample));
   }