Add sync_callbacks.h for Sync FileSystem callbacks.

webkit/fileapi/syncable/sync_callbacks.h

Index: webkit/fileapi/syncable/sync_callbacks.h
diff --git a/webkit/fileapi/syncable/sync_callbacks.h b/webkit/fileapi/syncable/sync_callbacks.h
new file mode 100644
index 0000000000000000000000000000000000000000..1339e428ffcf57e018640d761e4dd57ffb90afd0
--- /dev/null
+++ b/webkit/fileapi/syncable/sync_callbacks.h
@@ -0,0 +1,19 @@
+// 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_SYNCABLE_SYNC_CALLBACKS_H_
+#define WEBKIT_FILEAPI_SYNCABLE_SYNC_CALLBACKS_H_
+
+#include "base/callback_forward.h"
+#include "webkit/fileapi/syncable/sync_status_code.h"
+
+namespace fileapi {
+class FileSystemURL;
+
+typedef base::Callback<void(SyncStatusCode status)> StatusCallback;
+typedef base::Callback<void(SyncStatusCode, const FileSystemURL& url)>
+    SyncCompletionCallback;
+}  // namespace sync_file_system

[kinuko, 2012/10/24 03:16:54]

nit: please put empty lines after line 11 and before line 17.  I prefer having
empty line between the typedefs too.

+
+#endif  // WEBKIT_FILEAPI_SYNCABLE_SYNC_CALLBACKS_H_