Remove CloseFile from FileSystem.

chrome/browser/chromeos/drive/webkit_file_stream_writer_impl.h

 // Copyright 2013 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_DRIVE_WEBKIT_FILE_STREAM_WRITER_IMPL_H_
 #define CHROME_BROWSER_CHROMEOS_DRIVE_WEBKIT_FILE_STREAM_WRITER_IMPL_H_
 
 #include "base/basictypes.h"
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
@@ skipping 40 matching lines @@
                     const net::CompletionCallback& callback) OVERRIDE;
   virtual int Cancel(const net::CompletionCallback& callback) OVERRIDE;
   virtual int Flush(const net::CompletionCallback& callback) OVERRIDE;
 
  private:
   // Part of Write(). Called after CreateWritableSnapshotFile is completed.
   void WriteAfterCreateWritableSnapshotFile(
       net::IOBuffer* buf,
       int buf_len,
       base::PlatformFileError open_result,
-      const base::FilePath& local_path);
+      const base::FilePath& local_path,
+      const base::Closure& close_callback_on_ui_thread);
 
   FileSystemGetter file_system_getter_;
   scoped_refptr<base::TaskRunner> file_task_runner_;
   const base::FilePath file_path_;
   const int64 offset_;
 
   scoped_ptr<fileapi::FileStreamWriter> local_file_writer_;
+  base::Closure close_callback_on_ui_thread_;
   net::CompletionCallback pending_write_callback_;
   net::CompletionCallback pending_cancel_callback_;
 
   // Note: This should remain the last member so it'll be destroyed and
   // invalidate the weak pointers before any other members are destroyed.
   base::WeakPtrFactory<WebkitFileStreamWriterImpl> weak_ptr_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WebkitFileStreamWriterImpl);
 };
 
 }  // namespace internal
 }  // namespace drive
 
 #endif  // CHROME_BROWSER_CHROMEOS_DRIVE_WEBKIT_FILE_STREAM_WRITER_IMPL_H_