Отправить message из background-скрипта в content-скрипт (расширение Opera)

content_script.js:
  chrome.extension.sendRequest(
    {
      type: "check",
      data: getDomain() // see also document.location.href
    }, function(response) {
      console.log("Background said: " + response.result + " " + document.location.href);
      if (response.result == "y") {
      }
  });

background.js:

chrome.extension.onRequest.addListener(
  function (request, sender, sendResponse) {
    if(request && request.type == "check") {
      console.log("recv: " + request.data);
      sendResponse({
        result: check(request.data)
      });
    }
  }
);