Index: src/wp-includes/class-oembed.php
===================================================================
--- src/wp-includes/class-oembed.php	(revision 28578)
+++ src/wp-includes/class-oembed.php	(working copy)
@@ -21,12 +21,59 @@
 	public $providers = array();
 
 	/**
-	 * Constructor
-	 *
-	 * @uses apply_filters() Filters a list of pre-defined oEmbed providers.
+	 * Constructor.
 	 */
 	public function __construct() {
-		$providers = array(
+		/**
+		 * Filter the list of oEmbed providers.
+		 *
+		 * Discovery is disabled for users lacking the unfiltered_html capability.
+		 * Only providers in this array will be used for those users.
+		 *
+		 * Supported providers:
+		 *
+		 * | Provider     | Flavor           | Since              |
+		 * | ------------ | ---------------- | ------------------ |
+		 * | Blip         | blip.tv          | 2.9.0              |
+		 * | CollegeHumor | collegehumor.com | 4.0.0              |
+		 * | Dailymotion  | dailymotion.com  | 2.9.0              |
+		 * | Dailymotion  | dai.ly           | 3.6.0              |
+		 * | Flickr       | flickr.com       | 2.9.0              |
+		 * | Flickr       | flic.kr          | 3.6.0              |
+		 * | Funny or Die | funnyordie.com   | 3.0.0              |
+		 * | Hulu         | hulu.com         | 2.9.0              |
+		 * | Imgur        | imgur.com        | 3.9.0              |
+		 * | Issuu        | issuu.com        | 4.0.0              |
+		 * | Instagram    | instagram.com    | 3.5.0              |
+		 * | Instagram    | instagr.am       | 3.5.0              |
+		 * | Meetup.com   | meetup.com       | 3.9.0              |
+		 * | Meetup.com   | meetu.ps         | 3.9.0              |
+		 * | Mixcloud     | mixcloud.com     | 4.0.0              |
+		 * | Photobucket  | photobucket.com  | 2.9.0              |
+		 * | Polldaddy    | polldaddy.com    | 3.0.0              |
+		 * | Polldaddy    | poll.fm          | 4.0.0              |
+		 * | Qik          | qik.com          | 2.9.0 (deprecated) |
+		 * | Rdio         | rdio.com         | 3.6.0              |
+		 * | Rdio         | rd.io            | 3.6.0              |
+		 * | Revision3    | revision3.com    | 2.9.0              |
+		 * | Scribd       | scribd.com       | 2.9.0              |
+		 * | Slideshare   | slideshare.net   | 3.5.0              |
+		 * | SoundCloud   | soundcloud.com   | 3.5.0              |
+		 * | Spotify      | spotify.com      | 3.6.0              |
+		 * | Twitter      | twitter.com      | 3.4.0              |
+		 * | Viddler      | viddler.com      | 2.9.0              |
+		 * | Vimeo        | vimeo.com        | 2.9.0              |
+		 * | WordPress.tv | wordpress.tv     | 2.9.0              |
+		 * | YouTube      | youtube.com      | 2.9.0              |
+		 * | YouTube      | youtu.be         | 3.0.0              |
+		 *
+		 * @see wp_oembed_add_provider()
+		 *
+		 * @since 2.9.0
+		 *
+		 * @param array $providers An array of popular oEmbed providers.
+		 */
+		$this->providers = apply_filters( 'oembed_providers', array(
 			'#http://(www\.)?youtube\.com/(watch|playlist).*#i'   => array( 'http://www.youtube.com/oembed',                      true  ),
 			'#https://(www\.)?youtube\.com/(watch|playlist).*#i'  => array( 'http://www.youtube.com/oembed?scheme=https',         true  ),
 			'#http://youtu\.be/.*#i'                              => array( 'http://www.youtube.com/oembed',                      true  ),
@@ -49,7 +96,7 @@
 			'#https?://poll\.fm/.*#i'                             => array( 'http://polldaddy.com/oembed/',                       true  ),
 			'#https?://(www\.)?funnyordie\.com/videos/.*#i'       => array( 'http://www.funnyordie.com/oembed',                   true  ),
 			'#https?://(www\.)?twitter\.com/.+?/status(es)?/.*#i' => array( 'https://api.twitter.com/1/statuses/oembed.{format}', true  ),
- 			'#https?://(www\.)?soundcloud\.com/.*#i'              => array( 'http://soundcloud.com/oembed',                       true  ),
+			'#https?://(www\.)?soundcloud\.com/.*#i'              => array( 'http://soundcloud.com/oembed',                       true  ),
 			'#https?://(www\.)?slideshare\.net/*#'                => array( 'http://www.slideshare.net/api/oembed/2',             true  ),
 			'#http://instagr(\.am|am\.com)/p/.*#i'                => array( 'http://api.instagram.com/oembed',                    true  ),
 			'#https?://(www\.)?rdio\.com/.*#i'                    => array( 'http://www.rdio.com/api/oembed/',                    true  ),
@@ -60,22 +107,8 @@
 			'#https?://(www\.)?issuu\.com/.+/docs/.+#i'           => array( 'http://issuu.com/oembed_wp',                         true  ),
 			'#https?://(www\.)?collegehumor\.com/video/.*#i'      => array( 'http://www.collegehumor.com/oembed.{format}',        true  ),
 			'#https?://(www\.)?mixcloud\.com/.*#i'                => array( 'http://www.mixcloud.com/oembed',                     true  ),
-		);
+		) );
 
-		/**
-		 * Filter the list of oEmbed providers.
-		 *
-		 * Discovery is disabled for users lacking the unfiltered_html capability.
-		 * Only providers in this array will be used for those users.
-		 *
-		 * @see wp_oembed_add_provider()
-		 *
-		 * @since 2.9.0
-		 *
-		 * @param array $providers An array of popular oEmbed providers.
-		 */
-		$this->providers = apply_filters( 'oembed_providers', $providers );
-
 		// Fix any embeds that contain new lines in the middle of the HTML which breaks wpautop().
 		add_filter( 'oembed_dataparse', array($this, '_strip_newlines'), 10, 3 );
 	}