Re-write many calls to WrapUnique() with MakeUnique()

chrome/browser/chromeos/file_system_provider/throttled_file_system_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 "chrome/browser/chromeos/file_system_provider/throttled_file_system.h"
 
 #include <stddef.h>
 
 #include <memory>
 #include <vector>
@@ skipping 43 matching lines @@
   void SetUpFileSystem(size_t limit) {
     MountOptions options(kFileSystemId, kDisplayName);
     options.opened_files_limit = limit;
 
     ProvidedFileSystemInfo file_system_info(
         kExtensionId, options, base::FilePath() /* mount_path */,
         false /* configurable */, true /* watchable */,
         extensions::SOURCE_FILE);
 
     file_system_.reset(new ThrottledFileSystem(
-        base::WrapUnique(new FakeProvidedFileSystem(file_system_info))));
+        base::MakeUnique<FakeProvidedFileSystem>(file_system_info)));
   }
 
   content::TestBrowserThreadBundle thread_bundle_;
   std::unique_ptr<ThrottledFileSystem> file_system_;
 };
 
 TEST_F(FileSystemProviderThrottledFileSystemTest, OpenFile_LimitedToOneAtOnce) {
   SetUpFileSystem(1);
 
   OpenLog first_open_log;
@@ skipping 78 matching lines @@
 
   base::RunLoop().RunUntilIdle();
 
   ASSERT_EQ(1u, first_open_log.size());
   EXPECT_EQ(base::File::FILE_OK, first_open_log[0].second);
   EXPECT_EQ(0u, second_open_log.size());
 }
 
 }  // namespace file_system_provider
 }  // namespace chromeos