gistfile1.txt

//force IE to render in latest version or use Google chrome
$meta_edge = array(
  '#type' => 'html_tag',
  '#tag' => 'meta',
  '#attributes' => array(
    'http-equiv' => 'X-UA-Compatible',
    'content' =>  'IE=edge,chrome=1',
  )
);

//Add header meta tag to head
drupal_add_html_head( $meta_edge, 'meta_edge' );