Update ReadMe files.

extensions/okhttp/README.md

@@ -2,8 +2,8 @@
 
 ## Description ##
 
-The OkHttp Extension is a [HTTP Data Source][] implementation using Square's [OkHttp][].
+The OkHttp Extension is an [HttpDataSource][] implementation using Square's [OkHttp][].
 
-[HTTP Data Source]: http://google.github.io/ExoPlayer/doc/reference/com/google/android/exoplayer/upstream/HttpDataSource.html
+[HttpDataSource]: https://google.github.io/ExoPlayer/doc/reference/com/google/android/exoplayer/upstream/HttpDataSource.html
+[OkHttp]: https://square.github.io/okhttp/
 
-[OkHttp]: http://square.github.io/okhttp/
\ No newline at end of file

extensions/opus/README.md

@@ -2,9 +2,9 @@
 
 ## Description ##
 
-The Opus Extension is a [Track Renderer][] implementation that helps you bundle libopus (the Opus decoding library) into your app and use it along with ExoPlayer to play Opus audio on Android devices.
+The Opus Extension is a [TrackRenderer][] implementation that helps you bundle libopus (the Opus decoding library) into your app and use it along with ExoPlayer to play Opus audio on Android devices.
 
-[Track Renderer]: http://google.github.io/ExoPlayer/doc/reference/com/google/android/exoplayer/TrackRenderer.html
+[TrackRenderer]: https://google.github.io/ExoPlayer/doc/reference/com/google/android/exoplayer/TrackRenderer.html
 
 ## Build Instructions (Android Studio and Eclipse) ##
 

extensions/vp9/README.md

@@ -2,9 +2,9 @@
 
 ## Description ##
 
-The VP9 Extension is a [Track Renderer][] implementation that helps you bundle libvpx (the VP9 decoding library) into your app and use it along with ExoPlayer to play VP9 video on Android devices.
+The VP9 Extension is a [TrackRenderer][] implementation that helps you bundle libvpx (the VP9 decoding library) into your app and use it along with ExoPlayer to play VP9 video on Android devices.
 
-[Track Renderer]: http://google.github.io/ExoPlayer/doc/reference/com/google/android/exoplayer/TrackRenderer.html
+[TrackRenderer]: https://google.github.io/ExoPlayer/doc/reference/com/google/android/exoplayer/TrackRenderer.html
 
 ## Build Instructions (Android Studio and Eclipse) ##