Convert FieldTrialList to Accept a std::unique_ptr

chrome/browser/safe_browsing/incident_reporting/last_download_finder_unittest.cc

 // Copyright 2014 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 "chrome/browser/safe_browsing/incident_reporting/last_download_finder.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <string>
@@ skipping 371 matching lines @@
       last_non_binary_download;
   RunLastDownloadFinder(&last_binary_download, &last_non_binary_download);
   EXPECT_FALSE(last_binary_download);
   EXPECT_TRUE(last_non_binary_download);
 }
 
 // Tests that a download is found from a single profile when the field trial is
 // enabled.
 TEST_F(LastDownloadFinderTest, SimpleEndToEndFieldTrial) {
   // Set up a field trial
-  base::FieldTrialList field_trial_list(new base::MockEntropyProvider());
+  base::FieldTrialList field_trial_list(
+      base::MakeUnique<base::MockEntropyProvider>());
   base::FieldTrialList::CreateFieldTrial("SafeBrowsingIncidentReportingService",
                                          "Enabled");
   // Create a profile with a history service that is opted-in to Safe Browsing
   // only.
   TestingProfile* profile = CreateProfile(SAFE_BROWSING_OPT_IN);
 
   // Add a download.
   AddDownload(profile, CreateTestDownloadRow(kBinaryFileName));
 
   std::unique_ptr<ClientIncidentReport_DownloadDetails> last_binary_download;
@@ skipping 60 matching lines @@
       base::Bind(&LastDownloadFinderTest::OnLastDownload,
                  base::Unretained(this), &last_binary_download,
                  &last_non_binary_download, run_loop.QuitClosure())));
 
   run_loop.Run();
 
   ASSERT_TRUE(last_binary_download);
 }
 
 }  // namespace safe_browsing