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

webkit/fileapi/local_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_FILEAPI_LOCAL_FILE_STREAM_WRITER_H_
 #define WEBKIT_FILEAPI_LOCAL_FILE_STREAM_WRITER_H_
 
 #include <utility>
 
 #include "base/compiler_specific.h"
@@ skipping 12 matching lines @@
 namespace fileapi {
 
 // This class is a thin wrapper around net::FileStream for writing local files.
 class FILEAPI_EXPORT_PRIVATE LocalFileStreamWriter : public FileStreamWriter {
  public:
   // Create a writer for the existing file in the path |file_path| starting from
   // |initial_offset|.
   LocalFileStreamWriter(const FilePath& file_path, int64 initial_offset);
   virtual ~LocalFileStreamWriter();
 
-  // FileStreamWriteroverrides.
+  // FileStreamWriter overrides.
   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:
   // Opens |file_path_| and if it succeeds, proceeds to InitiateSeek().
   // If failed, the error code is returned by calling |error_callback|.
   int InitiateOpen(const net::CompletionCallback& error_callback,
                    const base::Closure& main_operation);
   void DidOpen(const net::CompletionCallback& error_callback,
                const base::Closure& main_operation,
                int result);
 
   // Seeks to |initial_offset_| and proceeds to |main_operation| if it succeeds.
   // If failed, the error code is returned by calling |error_callback|.
   void InitiateSeek(const net::CompletionCallback& error_callback,
                     const base::Closure& main_operation);
   void DidSeek(const net::CompletionCallback& error_callback,
                const base::Closure& main_operation,
                int64 result);
 
   // Passed as the |main_operation| of InitiateOpen() function.
   void ReadyToWrite(net::IOBuffer* buf, int buf_len,
                     const net::CompletionCallback& callback);
 
   // Writes asynchronously to the file.
   int InitiateWrite(net::IOBuffer* buf, int buf_len,
                     const net::CompletionCallback& callback);
   void DidWrite(const net::CompletionCallback& callback, int result);
 
+  // Flushes asynchronously to the file.
+  int InitiateFlush(const net::CompletionCallback& callback);
+  void DidFlush(const net::CompletionCallback& callback, int result);
+
   // Stops the in-flight operation and calls |cancel_callback_| if it has been
   // set by Cancel() for the current operation.
   bool CancelIfRequested();
 
   // Initialization parameters.
   const FilePath file_path_;
   const int64 initial_offset_;
 
   // Current states of the operation.
   bool has_pending_operation_;
   scoped_ptr<net::FileStream> stream_impl_;
   net::CompletionCallback cancel_callback_;
 
   base::WeakPtrFactory<LocalFileStreamWriter> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(LocalFileStreamWriter);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_LOCAL_FILE_STREAM_WRITER_H_