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

chrome/browser/chromeos/file_system_provider/fileapi/buffering_file_stream_writer.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_FILEAPI_BUFFERING_FILE_STREAM_WRITER_H_
 #define CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_FILEAPI_BUFFERING_FILE_STREAM_WRITER_H_
 
+#include <memory>
+
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
-#include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "storage/browser/fileapi/file_stream_writer.h"
 
 namespace net {
 class IOBuffer;
 }  // namespace net
 
 namespace chromeos {
 namespace file_system_provider {
 
 // Wraps the file stream writer implementation with an intermediate buffer.
 // Writes data from the inner file stream writer in chunks of size at least
 // |intermediate_buffer_length| bytes (or less for the last chunk, or when
 // Flush() is explicitely called).
 //
 // The underlying inner file stream writer *must not* return any values
 // synchronously. Instead, results must be returned by a callback, including
 // errors. Moreover, partial writes are *not* supported.
 class BufferingFileStreamWriter : public storage::FileStreamWriter {
  public:
   BufferingFileStreamWriter(
-      scoped_ptr<storage::FileStreamWriter> file_stream_writer,
+      std::unique_ptr<storage::FileStreamWriter> file_stream_writer,
       int intermediate_buffer_length);
 
   ~BufferingFileStreamWriter() override;
 
   // storage::FileStreamWriter overrides.
   int Write(net::IOBuffer* buf,
             int buf_len,
             const net::CompletionCallback& callback) override;
   int Cancel(const net::CompletionCallback& callback) override;
   int Flush(const net::CompletionCallback& callback) override;
@@ skipping 33 matching lines @@
       int bytes_left,
       const net::CompletionCallback& callback,
       int result);
 
   // Called when flushing the intermediate buffer for a flush call is completed
   // with either a success or an error.
   void OnFlushIntermediateBufferForFlushCompleted(
       const net::CompletionCallback& callback,
       int result);
 
-  scoped_ptr<storage::FileStreamWriter> file_stream_writer_;
+  std::unique_ptr<storage::FileStreamWriter> file_stream_writer_;
   int intermediate_buffer_length_;
   scoped_refptr<net::IOBuffer> intermediate_buffer_;
   int buffered_bytes_;
 
   base::WeakPtrFactory<BufferingFileStreamWriter> weak_ptr_factory_;
   DISALLOW_COPY_AND_ASSIGN(BufferingFileStreamWriter);
 };
 
 }  // namespace file_system_provider
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_FILE_SYSTEM_PROVIDER_FILEAPI_BUFFERING_FILE_STREAM_WRITER_H_