Move webkit/chromeos into webkit/browser/chromeos

webkit/chromeos/fileapi/async_file_stream.h

-// Copyright (c) 2011 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 WEBKIT_CHROMEOS_FILEAPI_ASYNC_FILE_STREAM_H_
-#define WEBKIT_CHROMEOS_FILEAPI_ASYNC_FILE_STREAM_H_
-
-#include "base/callback.h"
-#include "base/platform_file.h"
-
-namespace fileapi {
-
-using base::PlatformFileError;
-
-// This class is used for implementing Open() in FileUtilAsync. This class
-// is similar to net::FileStream, but supporting only the asynchronous
-// operations and not necessarily relying on PlatformFile.
-class AsyncFileStream {
- public:
-  // Used for Read() and Write(). |result| is the return code of the
-  // operation, and |length| is the length of data read or written.
-  typedef base::Callback<void(PlatformFileError result,
-                              int64 length)> ReadWriteCallback;
-
-  // Used for Seek(). |result| is the return code of the operation.
-  typedef base::Callback<void(PlatformFileError)> SeekCallback;
-
-  virtual ~AsyncFileStream() {};
-
-  // Reads data from the current stream position. Up to |length| bytes
-  // will be read from |buffer|. The memory pointed to by |buffer| must
-  // remain valid until the callback is called. On success,
-  // PLATFORM_FILE_OK is passed to |callback| with the number of bytes
-  // read. On failure, an error code is passed instead.
-  virtual void Read(char* buffer,
-                    int64 length,
-                    const ReadWriteCallback& callback) = 0;
-
-  // Writes data at the current stream position. Up to |length| bytes will
-  // be written from |buffer|. The memory pointed to by |buffer| must
-  // remain valid until the callback is called. On success,
-  // PLATFORM_FILE_OK is passed to |callback| with the number of bytes
-  // written. On failure, an error code is passed instead.
-  virtual void Write(const char* buffer,
-                     int64 length,
-                     const ReadWriteCallback& callback) = 0;
-
-  // Moves the stream position. On success, PLATFORM_FILE_OK is passed to
-  // |callback|. On error, an error code is passed instead.
-  virtual void Seek(int64 offset,
-                    const SeekCallback& callback) = 0;
-};
-
-}  // namespace fileapi
-
-#endif  // WEBKIT_CHROMEOS_FILEAPI_ASYNC_FILE_STREAM_H_