IndexedDB: Fixed support for empty blobs.

storage/browser/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 STORAGE_BROWSER_FILEAPI_LOCAL_FILE_STREAM_WRITER_H_
 #define STORAGE_BROWSER_FILEAPI_LOCAL_FILE_STREAM_WRITER_H_
 
 #include <utility>
 
 #include "base/callback.h"
@@ skipping 27 matching lines @@
             int buf_len,
             const net::CompletionCallback& callback) override;
   int Cancel(const net::CompletionCallback& callback) override;
   int Flush(const net::CompletionCallback& callback) override;
 
  private:
   friend class content::LocalFileStreamWriterTest;
   friend class FileStreamWriter;
   LocalFileStreamWriter(base::TaskRunner* task_runner,
                         const base::FilePath& file_path,
-                        int64 initial_offset,
-                        OpenOrCreate open_or_create);
+                        int64 initial_offset);
 
   // 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.
@@ skipping 16 matching lines @@
   // 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 base::FilePath file_path_;
-  OpenOrCreate open_or_create_;
   const int64 initial_offset_;
   scoped_refptr<base::TaskRunner> task_runner_;
 
   // 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 storage
 
 #endif  // STORAGE_BROWSER_FILEAPI_LOCAL_FILE_STREAM_WRITER_H_