title: Expose C++ object to Javascript in Qt with QtWebEngine
body: <p>With QtWebkit it is possible to expose C++ objects to Javascript via <code>QWebFrame::addToJavaScriptWindowObject</code> as described in <a href="https://stackoverflow.com/a/20685002/595937">https://stackoverflow.com/a/20685002/595937</a>  </p>
  
  <p>Can the same thing be accomplished in Qt 5.4 using QtWebEngine?</p>