message: Use proper log severity for ignored notifications.
diff: @@ -55,7 +55,7 @@ bool JsonRpcDispatcher::CallNotification(const nlohmann::json &req,
  const std::string &method) {
  const auto &found = notifications_.find(method);
  if (found == notifications_.end()) {
  - LOG(ERROR) << "Unhandled notification '" << method << "'";
  + LOG(INFO) << "Ignoring notification '" << method << "'";
  return false;
  }
  try {
  