HTML5 Drupal 7 Tweaks

template.php

<?php

/**
 * Implements hook_html_head_alter().
 * - Simplify the meta charset element.
 */
function THEMENAME_html_head_alter(&$head_elements) {
  $head_elements['system_meta_content_type']['#attributes'] = array(
    'charset' => 'utf-8',
  );
  // Force IE to always run the latest rendering engine.
  $head_elements['x-ua-compatible'] = array(
    '#type' => 'html_tag',
    '#tag' => 'meta',
    '#attributes' => array(
      'http-equiv' => 'X-UA-Compatible',
      'content' => 'IE=edge,chrome=1',
    ),
  );
}

/**
 * Implements hook_preprocess_html_tag().
 * - Remove the type attribute from the <script>, <style> and <link> elements.
 * - Remove the CDATA comments from inline JavaScript and CSS.
 */
function THEMENAME_process_html_tag(&$vars) {
  $element = &$vars['element'];

  // Remove the "type" attribute.
  if (in_array($element['#tag'], array('script', 'link', 'style'))) {
    unset($element['#attributes']['type']);
    // Remove CDATA comments.
    if (isset($element['#value_prefix']) && ($element['#value_prefix'] == "\n<!--//--><![CDATA[//><!--\n" || $element['#value_prefix'] == "\n<!--/*--><![CDATA[/*><!--*/\n")) {
      unset($element['#value_prefix']);
    }
    if (isset($element['#value_suffix']) && ($element['#value_suffix'] == "\n//--><!]]>\n" || $element['#value_suffix'] == "\n/*]]>*/-->\n")) {
      unset($element['#value_suffix']);
    }
  }
}