EDIT

  $tasks_performed = array();

  // permissions for node types

  $node_type_names = node_type_get_names();

  $types_to_update = array('page', 'story', 'article');

  foreach ($types_to_update as $name){

    if(in_array($name, $node_type_names)) {

      $node_type_permissions = array(

          'create ' . $name . ' content',

          'edit any ' . $name . ' content',

          'edit own ' . $name . ' content',

          'delete any ' . $name . ' content',

          'delete own ' . $name . ' content',

      );

      user_role_grant_permissions($role->rid, $node_type_permissions);

      $tasks_performed[] = "node type " . $name;

    }

  }

  if(module_exists('extlinks')){

    $new_permissions = array(

        'access extlinks content',

        'administer extlinks',

    );

    user_role_grant_permissions($role->rid, $new_permissions);

    $tasks_performed[] = 'permissions for extlinks';

  }

  foreach (filter_formats() as $key=>$format){

    if($key == 'full_html' || $format->format == "Full HTML"){

      $new_permissions = array(

          'use text format full_html'

      );

      user_role_grant_permissions($role->rid, $new_permissions);

      $tasks_performed[] = 'use text format full_html';

    }

  }

  // assure  'create url aliases' can be set

  if(!module_exists('path')){

    module_enable(array('path'), TRUE);

    user_role_grant_permissions($role->rid, $new_permissions);

    $tasks_performed[] = 'module path enabled';

  }

      'view own unpublished content',

      'flush caches'

  $tasks_performed[] = 'and other permissions';

  return "adding missing permissions for role CDM Admin: " . join(', ', $tasks_performed);