Convert FieldTrialList to Accept a std::unique_ptr

chrome/browser/io_thread_unittest.cc

Index: chrome/browser/io_thread_unittest.cc
diff --git a/chrome/browser/io_thread_unittest.cc b/chrome/browser/io_thread_unittest.cc
index 02b11311c706a39104c6ea23606a4804a23c9519..736958edb690fff7eee19041302dd3ba70ba4c46 100644
--- a/chrome/browser/io_thread_unittest.cc
+++ b/chrome/browser/io_thread_unittest.cc
@@ -7,6 +7,7 @@
 #include "base/at_exit.h"
 #include "base/command_line.h"
 #include "base/macros.h"
+#include "base/memory/ptr_util.h"
 #include "base/metrics/field_trial.h"
 #include "base/run_loop.h"
 #include "base/test/mock_entropy_provider.h"
@@ -293,7 +294,8 @@ TEST_F(ConfigureParamsFromFieldTrialsAndCommandLineTest,
 TEST_F(ConfigureParamsFromFieldTrialsAndCommandLineTest,
        DisableQuicFromCommandLineOverridesFieldTrial) {
   auto field_trial_list =
-      base::MakeUnique<base::FieldTrialList>(new base::MockEntropyProvider());
+      base::MakeUnique<base::FieldTrialList>(
+          base::MakeUnique<base::MockEntropyProvider>());
   variations::testing::ClearAllVariationParams();
 
   std::map<std::string, std::string> field_trial_params;