Flush at the end of local file writing in FileWriter API.

webkit/chromeos/fileapi/remote_file_stream_writer.h

 // Copyright (c) 2012 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_REMOTE_FILE_STREAM_WRITER_H_
 #define WEBKIT_CHROMEOS_FILEAPI_REMOTE_FILE_STREAM_WRITER_H_
 
 #include "base/basictypes.h"
 #include "base/file_path.h"
 #include "base/platform_file.h"
@@ skipping 24 matching lines @@
   RemoteFileStreamWriter(
       const scoped_refptr<RemoteFileSystemProxyInterface>& remote_filesystem,
       const FileSystemURL& url,
       int64 offset);
   virtual ~RemoteFileStreamWriter();
 
   // FileWriter override.
   virtual int Write(net::IOBuffer* buf, int buf_len,
                     const net::CompletionCallback& callback) OVERRIDE;
   virtual int Cancel(const net::CompletionCallback& callback) OVERRIDE;
+  virtual int Flush(const net::CompletionCallback& callback) OVERRIDE;
 
  private:
   // Callback function to do the continuation of the work of the first Write()
   // call, which tries to open the local copy of the file before writing.
   void OnFileOpened(
       net::IOBuffer* buf,
       int buf_len,
       const net::CompletionCallback& callback,
       base::PlatformFileError open_result,
       const FilePath& local_path,
@@ skipping 10 matching lines @@
   net::CompletionCallback pending_cancel_callback_;
 
   base::WeakPtrFactory<RemoteFileStreamWriter> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(RemoteFileStreamWriter);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_CHROMEOS_FILEAPI_REMOTE_FILE_STREAM_WRITER_H_