[atom/common/api/atom_api_clipboard.cc](https://github.com/electron/electron/blob/master/atom/common/api/atom_api_clipboard.cc)

See TODO in the code.

/cc @gavignus 

atom/common/api/atom_api_clipboard.cc
ui::ScopedClipboardWriter writer(GetClipboardType(args));
  writer.WriteHTML(html, std::string());
}
v8::Local<v8::Value> Clipboard::ReadBookmark(mate::Arguments* args) {
  base::string16 title;
  std::string url;
  mate::Dictionary dict = mate::Dictionary::CreateEmpty(args->isolate());
  ui::Clipboard* clipboard = ui::Clipboard::GetForCurrentThread();
  clipboard->ReadBookmark(&title, &url);
  dict.Set("title", title);
  dict.Set("url", url);
  return dict.GetHandle();
}
void Clipboard::WriteBookmark(const base::string16& title,
                              const std::string& url,
                              mate::Arguments* args) {
  ui::ScopedClipboardWriter writer(GetClipboardType(args));
  writer.WriteBookmark(title, url);
}
gfx::Image Clipboard::ReadImage(mate::Arguments* args) {