void RenderView::InsertCSS(const std::wstring& frame_xpath,
                           const std::string& css,
                           const std::string& id) {
  WebFrame* web_frame = GetChildFrame(frame_xpath);
  if (!web_frame)
    return;

  web_frame->insertStyleText(WebString::fromUTF8(css), WebString::fromUTF8(id));
}

Unknown