Convert FieldTrialList to Accept a std::unique_ptr

chrome/browser/extensions/extension_service_sync_unittest.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include <stddef.h>
 
 #include <map>
 #include <memory>
 #include <string>
 #include <utility>
@@ skipping 1544 matching lines @@
   InstallCRX(data_dir().AppendASCII("theme.crx"), INSTALL_NEW);
   EXPECT_TRUE(processor->changes().empty());
 }
 
 #if defined(ENABLE_SUPERVISED_USERS)
 
 class ExtensionServiceTestSupervised : public ExtensionServiceSyncTest,
                                        public SupervisedUserService::Delegate {
  public:
   ExtensionServiceTestSupervised()
-      : field_trial_list_(new base::MockEntropyProvider()) {}
+      : field_trial_list_(base::MakeUnique<base::MockEntropyProvider>()) {}
 
   void SetUp() override {
     ExtensionServiceSyncTest::SetUp();
 
     // This is the update URL specified in the permissions test extension.
     // Setting it here is necessary to make the extension considered syncable.
     base::CommandLine::ForCurrentProcess()->AppendSwitchASCII(
         switches::kAppsGalleryUpdateURL,
         "http://localhost/autoupdate/updates.xml");
   }
@@ skipping 934 matching lines @@
         break;
       }
     }
   }
   EXPECT_TRUE(found_delete);
 
   // Make sure there is one extension, and there are no more apps.
   EXPECT_EQ(1u, extensions_processor.data().size());
   EXPECT_TRUE(apps_processor.data().empty());
 }