Update sync API to support attachments.

sync/protocol/proto_value_conversions.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.
 
 // Keep this file in sync with the .proto files in this directory.
 
 #include "sync/protocol/proto_value_conversions.h"
 
 #include <string>
 
@@ skipping 1035 matching lines @@
 }
 
 base::DictionaryValue* ClientConfigParamsToValue(
     const sync_pb::ClientConfigParams& proto) {
   base::DictionaryValue* value = new base::DictionaryValue();
   SET_INT32_REP(enabled_type_ids);
   SET_BOOL(tabs_datatype_enabled);
   return value;
 }
 
+base::DictionaryValue* AttachmentIdProtoToValue(
+    const sync_pb::AttachmentIdProto& proto) {
+  base::DictionaryValue* value = new base::DictionaryValue();
+  SET_STR(unique_id);
+  return value;
+}
+
 #undef SET
 #undef SET_REP
 
 #undef SET_BOOL
 #undef SET_BYTES
 #undef SET_INT32
 #undef SET_INT64
 #undef SET_INT64_REP
 #undef SET_STR
 #undef SET_STR_REP
 
 #undef SET_FIELD
 
 }  // namespace syncer