simple iframe into admin panel google charts

Solved this. Instead of putting it in a plugin i just put it in the Dashboard. Put this in custom-functions.php or functions.php in your theme:

// Create the function to output the contents of our Dashboard Widget
function iframe_dashboard_widget_function() {
    // Display whatever it is you want to show
    echo '<iframe src="https://imagecharteditor.appspot.com/" width="100%" height="1000px" frameBorder="0">Browser not compatible.</iframe>';
}

// Create the function use in the action hook
function example_add_dashboard_widgets() {
    wp_add_dashboard_widget('iframe_dashboard_widget', 'Google Charts', 'iframe_dashboard_widget_function');
}

// Hook into the 'wp_dashboard_setup' action to register our other functions
add_action('wp_dashboard_setup', 'example_add_dashboard_widgets' );