During upgrade to the Chromium 61 we have switched from GTK2 to GTK3
and now we have a few warnings about stuff being deprecated in GTK3.
Check any Linux build to get a list of them.

/cc @zcbenz 
atom/browser/ui/file_dialog_gtk.cc
private:
  void AddFilters(const Filters& filters);
  base::FilePath AddExtensionForFilename(const gchar* filename) const;
  atom::NativeWindowViews* parent_;
  atom::UnresponsiveSuppressor unresponsive_suppressor_;
  GtkWidget* dialog_;
  Filters filters_;
  SaveDialogCallback save_callback_;
  OpenDialogCallback open_callback_;
  DISALLOW_COPY_AND_ASSIGN(FileChooserDialog);
};
void FileChooserDialog::OnFileDialogResponse(GtkWidget* widget, int response) {
  gtk_widget_hide(dialog_);
  if (!save_callback_.is_null()) {
    if (response == GTK_RESPONSE_ACCEPT)
      save_callback_.Run(true, GetFileName());
    else
      save_callback_.Run(false, base::FilePath());
  } else if (!open_callback_.is_null()) {
    if (response == GTK_RESPONSE_ACCEPT)
      open_callback_.Run(true, GetFileNames());
    else
      open_callback_.Run(false, std::vector<base::FilePath>());
  }
  delete this;
}
void FileChooserDialog::AddFilters(const Filters& filters) {