Convert FieldTrialList to Accept a std::unique_ptr

net/http/transport_security_state_unittest.cc

Index: net/http/transport_security_state_unittest.cc
diff --git a/net/http/transport_security_state_unittest.cc b/net/http/transport_security_state_unittest.cc
index 2bd4ffdc6d6d436797e79f1f596332c0b2dad2a2..2026aa5b7038c673a03a27655ad2f825f5bb134b 100644
--- a/net/http/transport_security_state_unittest.cc
+++ b/net/http/transport_security_state_unittest.cc
@@ -11,6 +11,7 @@
 #include "base/base64.h"
 #include "base/files/file_path.h"
 #include "base/json/json_reader.h"
+#include "base/memory/ptr_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/rand_util.h"
 #include "base/sha1.h"
@@ -2315,7 +2316,8 @@ TEST_F(TransportSecurityStateTest, RequireCTForSymantec) {
   // necessary.
   hashes.clear();
   hashes.push_back(HashValue(symantec_hash_value));
-  base::FieldTrialList field_trial_list(new base::MockEntropyProvider());
+  base::FieldTrialList field_trial_list(
+      base::MakeUnique<base::MockEntropyProvider>());
   base::FieldTrialList::CreateFieldTrial("EnforceCTForProblematicRoots",
                                          "disabled");