Add access modifier to methods of HTTP classes. There are no new private or protected methods, so no need for `__call()`.

 See #27881, #22234.


git-svn-id: https://develop.svn.wordpress.org/trunk@28506 602fd350-edb4-49c9-b593-d223f7449a82
Add access modifier to methods/members in `WP_oEmbed`. Adds a magic `__call()` method for BC.

See #27881, #22234.


git-svn-id: https://develop.svn.wordpress.org/trunk@28507 602fd350-edb4-49c9-b593-d223f7449a82