Convert FieldTrialList to Accept a std::unique_ptr

chrome/browser/predictors/resource_prefetch_common_unittest.cc

Index: chrome/browser/predictors/resource_prefetch_common_unittest.cc
diff --git a/chrome/browser/predictors/resource_prefetch_common_unittest.cc b/chrome/browser/predictors/resource_prefetch_common_unittest.cc
index 4eed9173b7b34c4245175db89b502f3c25aad400..792f2d1f7a00b475408556ca77ccf23a0210eebb 100644
--- a/chrome/browser/predictors/resource_prefetch_common_unittest.cc
+++ b/chrome/browser/predictors/resource_prefetch_common_unittest.cc
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "base/memory/ptr_util.h"
 #include "base/message_loop/message_loop.h"
 #include "base/metrics/field_trial.h"
 #include "base/metrics/statistics_recorder.h"
@@ -108,7 +109,8 @@ ResourcePrefetchCommonTest::ResourcePrefetchCommonTest()
 
 void ResourcePrefetchCommonTest::SetUp() {
   field_trial_list_.reset(new base::FieldTrialList(
-      new metrics::SHA1EntropyProvider("ResourcePrefetchCommonTest")));
+      base::MakeUnique<metrics::SHA1EntropyProvider>(
+          "ResourcePrefetchCommonTest")));
   base::StatisticsRecorder::Initialize();
 }