[Sync] Make SESSIONS an implicit type

sync/protocol/proto_value_conversions.cc

Index: sync/protocol/proto_value_conversions.cc
diff --git a/sync/protocol/proto_value_conversions.cc b/sync/protocol/proto_value_conversions.cc
index 886d55ab34864cbc340d647132bd95d393ac70da..ee5580ed6b2ed0840a172c4c8f28026bf838af57 100644
--- a/sync/protocol/proto_value_conversions.cc
+++ b/sync/protocol/proto_value_conversions.cc
@@ -581,6 +581,7 @@ DictionaryValue* GetUpdatesMessageToValue(
   SET_INT32(batch_size);
   SET_REP(from_progress_marker, DataTypeProgressMarkerToValue);
   SET_BOOL(streaming);
+  SET_BOOL(need_encryption_key);
   SET_BOOL(create_mobile_bookmarks_folder);
   return value;
 }
@@ -738,6 +739,7 @@ base::DictionaryValue* ClientConfigParamsToValue(
     const sync_pb::ClientConfigParams& proto) {
   DictionaryValue* value = new DictionaryValue();
   SET_INT32_REP(enabled_type_ids);
+  SET_BOOL(tabs_datatype_enabled);
   return value;
 }