Fill the un-encrypted metadata field in password specifics.

components/sync/core/password_metadata_filling.h

Index: components/sync/core/password_metadata_filling.h
diff --git a/components/sync/core/password_metadata_filling.h b/components/sync/core/password_metadata_filling.h
new file mode 100644
index 0000000000000000000000000000000000000000..740b4cc2fb29b5aaf0c0fdd7ac129cd4ecbda6e3
--- /dev/null
+++ b/components/sync/core/password_metadata_filling.h
@@ -0,0 +1,16 @@
+// Copyright 2016 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 COMPONENETS_SYNC_CORE_PASSWORDS_METADAT_FILLING_H_

[Nicolas Zea, 2016/09/23 23:10:37]

Two typos (componenents and metadat) in this macro. I'm surprised the presubmit
didn't catch that though?

Also, what about calling this file sync_features.h, and moving it to sync/base?
We're likely to have other features in the future, so may as well centralize it.

[melandory, 2016/10/04 10:13:12]

Yep, weird.
Done.

+#define COMPONENETS_SYNC_CORE_PASSWORDS_METADAT_FILLING_H_
+
+#include "base/feature_list.h"
+
+namespace syncer {
+
+extern const base::Feature kPasswordsMetadataFilling;

[Nicolas Zea, 2016/09/23 23:10:37]

I think it might be cleaner to just call this kFillPasswordMetadata

[melandory, 2016/10/04 10:13:12]

Done.

+
+}  // namespace syncer
+
+#endif  // COMPONENETS_SYNC_CORE_PASSWORDS_METADAT_FILLING_H_