/**
 * Returns the non-CDN'd URI to the specified path.
 *
 * @param string $path Must be a full path, e.g. dirname( __FILE__ )
 * @return string
 */
function wpcom_vip_noncdn_uri($path)
{
    // Be gentle on Windows, borrowed from core, see plugin_basename
    $path = str_replace('\\', '/', $path);
    // sanitize for Win32 installs
    $path = preg_replace('|/+|', '/', $path);
    // remove any duplicate slash
    return sprintf('%s%s', wpcom_vip_themes_root_uri(), str_replace(wpcom_vip_themes_root(), '', $path));
}
<?php

fieldmanager_set_baseurl(wpcom_vip_themes_root_uri() . '/plugins/fieldmanager/');
/**
 * Patch for get_user_attribute to work with Field Manager.
 * @param  integer $user_id User ID.
 * @param  string  $key     Optional key.
 * @param  boolean $single  True to return single value.
 *
 * @see    get_user_meta()
 *
 * @return mixed
 */
function wpcom_fieldmanager_get_user_attribute($user_id, $key, $single)
{
    $user_data = get_user_attribute($user_id, $key);
    if (!$single) {
        $user_data = array($user_data);
    }
    return $user_data;
}
// Replace user meta functions with user attributes.
add_filter('fm_user_context_get_data', function () {
    return 'wpcom_fieldmanager_get_user_attribute';
});
add_filter('fm_user_context_add_data', function () {
    return 'add_user_attribute';
});
add_filter('fm_user_context_update_data', function () {
    return 'update_user_attribute';
});
<?php

add_filter('mce_external_plugins', function ($plugins) {
    if (isset($plugins['table'])) {
        $plugins['table'] = wpcom_vip_themes_root_uri() . '/plugins/mce-table-buttons/tinymce4-table/plugin.min.js';
    }
    // hack around cross-domain issues because plugins_url is passed through our CDN
    return $plugins;
}, 99);
// run later so we override the plugin