Fill the un-encrypted metadata field in password specifics.

components/sync/core/sync_features.h

Index: components/sync/core/sync_features.h
diff --git a/components/sync/core/sync_features.h b/components/sync/core/sync_features.h
new file mode 100644
index 0000000000000000000000000000000000000000..a850329accac2f118570efe5653fa6828f78b7cc
--- /dev/null
+++ b/components/sync/core/sync_features.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_SYNC_FEATURE_H_
+#define COMPONENETS_SYNC_CORE_SYNC_FEATURE_H_
+
+#include "base/feature_list.h"
+
+namespace syncer {
+
+extern const base::Feature kFillPasswordMetadata;
+
+}  // namespace syncer
+
+#endif  // COMPONENETS_SYNC_CORE_SYNC_FEATURE_H_