Convert //chrome/browser/sync_file_system from scoped_ptr to std::unique_ptr

chrome/browser/sync_file_system/local/syncable_file_system_unittest.cc

 // Copyright 2013 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 <stdint.h>
 
 #include "base/macros.h"
 #include "base/stl_util.h"
 #include "base/thread_task_runner_handle.h"
 #include "chrome/browser/sync_file_system/local/canned_syncable_file_system.h"
@@ skipping 85 matching lines @@
   FileSystemContext* file_system_context() {
     return file_system_.file_system_context();
   }
 
   LocalFileChangeTracker* change_tracker() {
     return file_system_.backend()->change_tracker();
   }
 
   base::ScopedTempDir data_dir_;
   content::TestBrowserThreadBundle thread_bundle_;
-  scoped_ptr<leveldb::Env> in_memory_env_;
+  std::unique_ptr<leveldb::Env> in_memory_env_;
   CannedSyncableFileSystem file_system_;
 
  private:
   scoped_refptr<LocalFileSyncContext> sync_context_;
 
   base::WeakPtrFactory<SyncableFileSystemTest> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(SyncableFileSystemTest);
 };
 
@@ skipping 128 matching lines @@
                                   sync_file_system::SYNC_FILE_TYPE_DIRECTORY));
   VerifyAndClearChange(URL(kPath1),
                        FileChange(FileChange::FILE_CHANGE_DELETE,
                                   sync_file_system::SYNC_FILE_TYPE_DIRECTORY));
   VerifyAndClearChange(URL(kPath2),
                        FileChange(FileChange::FILE_CHANGE_DELETE,
                                   sync_file_system::SYNC_FILE_TYPE_FILE));
 }
 
 }  // namespace sync_file_system