Initial implementation of AudioTrack, AudioTrackList, VideoTrack, and VideoTrackList.

Source/core/html/HTMLMediaElement.idl

Index: Source/core/html/HTMLMediaElement.idl
diff --git a/Source/core/html/HTMLMediaElement.idl b/Source/core/html/HTMLMediaElement.idl
index 98b899f88e59ccc9f4030588fd7ad1d608adaec0..bf1cecbd81989d58724d7d7c7dce5a980df4882f 100644
--- a/Source/core/html/HTMLMediaElement.idl
+++ b/Source/core/html/HTMLMediaElement.idl
@@ -81,6 +81,8 @@
     [Reflect=muted] attribute boolean defaultMuted;
 
     // tracks
+    [RuntimeEnabled=AudioVideoTracks] readonly attribute AudioTrackList audioTracks;
+    [RuntimeEnabled=AudioVideoTracks] readonly attribute VideoTrackList videoTracks;
     [RuntimeEnabled=VideoTrack] readonly attribute TextTrackList textTracks;

[philipj_slow, 2014/03/09 09:04:14]

Do you want to rename VideoTrack to TextTracks to be less confusing, or is
renaming existing runtime-enabled features messy?

[acolwell GONE FROM CHROMIUM, 2014/03/18 22:02:15]

I'll do this in a separate CL. I don't really get why TextTrack wasn't used in
the first place.

[philipj_slow, 2014/03/20 16:17:39]

I'll be happy to review that separately! I just wasn't sure if renaming was
feasible or not.

     [RuntimeEnabled=VideoTrack, RaisesException] TextTrack addTextTrack(DOMString kind, optional DOMString label, optional DOMString language);