rspec around hook for runnign selenium_chrome with headless gem in capybara

spec_helper_with_headless_chrome.rb

    c.around(:each, :js => true) do |example|                                                                                                                                                  
      if Capybara.current_driver == :chrome                                                                                                                                            
        headless = Headless.new                                                                                                                                                                
        headless.start                                                                                                                                                                         
      end                                                                                                                                                                                      
                                                                                                                                                                                               
      example.run                                                                                                                                                                              
                                                                                                                                                                                               
      headless.destroy if Capybara.current_driver == :chrome                                                                                        
    end