base::Bind: Convert FileUtilProxy::CreateOrOpenCallback.

webkit/fileapi/file_system_file_util_proxy.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_FILEAPI_FILE_SYSTEM_FILE_UTIL_PROXY_H_
 #define WEBKIT_FILEAPI_FILE_SYSTEM_FILE_UTIL_PROXY_H_
 
 #include <vector>
 
 #include "base/callback.h"
@@ skipping 36 matching lines @@
 
   // Creates or opens a file with the given flags.  It is invalid to pass NULL
   // for the callback.
   // If PLATFORM_FILE_CREATE is set in |file_flags| it always tries to create
   // a new file at the given |file_path| and calls back with
   // PLATFORM_FILE_ERROR_FILE_EXISTS if the |file_path| already exists.
   static bool CreateOrOpen(const FileSystemOperationContext& context,
                            scoped_refptr<MessageLoopProxy> message_loop_proxy,
                            const FilePath& file_path,
                            int file_flags,
-                           CreateOrOpenCallback* callback);
+                           const CreateOrOpenCallback& callback);
 
   // Close the given file handle.
   static bool Close(const FileSystemOperationContext& context,
                     scoped_refptr<MessageLoopProxy> message_loop_proxy,
                     PlatformFile,
                     StatusCallback* callback);
 
   // Ensures that the given |file_path| exist.  This creates a empty new file
   // at |file_path| if the |file_path| does not exist.
   // If a new file han not existed and is created at the |file_path|,
@@ skipping 89 matching lines @@
       int64 length,
       StatusCallback* callback);
 
  private:
   DISALLOW_IMPLICIT_CONSTRUCTORS(FileSystemFileUtilProxy);
 };
 
 }  // namespace fileapi
 
 #endif  // WEBKIT_FILEAPI_FILE_SYSTEM_FILE_UTIL_PROXY_H_