[Sync] Add SyncEncryptionHandler

sync/internal_api/public/sync_encryption_handler.cc

+// 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.
+
+#include "sync/internal_api/public/sync_encryption_handler.h"
+
+namespace syncer {
+
+SyncEncryptionHandler::Observer::Observer() {}
+SyncEncryptionHandler::Observer::~Observer() {}
+
+SyncEncryptionHandler::SyncEncryptionHandler() {}
+SyncEncryptionHandler::~SyncEncryptionHandler() {}
+
+// Static.
+ModelTypeSet SyncEncryptionHandler::SensitiveTypes() {
+  // Both of these have their own encryption schemes, but we include them
+  // anyways.
+  ModelTypeSet types;
+  types.Put(PASSWORDS);
+  types.Put(NIGORI);
+  return types;
+}
+
+}  // namespace syncer