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

Source/core/html/track/AudioTrackList.idl

Index: Source/core/html/track/AudioTrackList.idl
diff --git a/Source/core/html/track/AudioTrackList.idl b/Source/core/html/track/AudioTrackList.idl
new file mode 100644
index 0000000000000000000000000000000000000000..c9ab9aaadd0eebd4f1f552efcb5385eb6d47d0b8
--- /dev/null
+++ b/Source/core/html/track/AudioTrackList.idl
@@ -0,0 +1,15 @@
+// Copyright 2014 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+[
+    RuntimeEnabled=AudioVideoTracks
+] interface AudioTrackList : EventTarget {
+  readonly attribute unsigned long length;
+  getter AudioTrack (unsigned long index);
+  AudioTrack getTrackById(DOMString id);

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

This is "AudioTrack?" in the spec, and that's the only difference in the IDL
block. The generated IDL is identical, so I suggest the "?" here and in the
other getTrackByIds. Also, trailing whitespace below.

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

Done.

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

Thanks! The trailing whitespace is still there though. (git cl apply complains
about it, I don't normally look for this.)

[acolwell GONE FROM CHROMIUM, 2014/03/28 01:32:35]

Done for realz.

+  
+  attribute EventHandler onchange;
+  attribute EventHandler onaddtrack;
+  attribute EventHandler onremovetrack;
+};