Make text track and cue wrapper objects dependent on their media element.

Source/core/html/track/TextTrackCue.cpp

Index: Source/core/html/track/TextTrackCue.cpp
diff --git a/Source/core/html/track/TextTrackCue.cpp b/Source/core/html/track/TextTrackCue.cpp
index ebf262f9b282d4d7db3b120dd822398f4e87a550..2a5f8b7638e6c75d6666828d94f7cbf621fac01a 100644
--- a/Source/core/html/track/TextTrackCue.cpp
+++ b/Source/core/html/track/TextTrackCue.cpp
@@ -35,6 +35,7 @@
 #include "bindings/v8/ExceptionMessages.h"
 #include "bindings/v8/ExceptionStatePlaceholder.h"
 #include "core/events/Event.h"
+#include "core/html/HTMLMediaElement.h"

[acolwell GONE FROM CHROMIUM, 2014/04/21 16:51:16]

nit: Why do you need the HTMLMediaElement include?

[sof, 2014/04/21 18:35:01]

No, redundant & removed; thanks (a leftover from an earlier #include
experiment.)

 #include "core/html/track/TextTrack.h"
 #include "core/html/track/TextTrackCueList.h"
 
@@ -83,6 +84,11 @@ void TextTrackCue::setTrack(TextTrack* track)
     m_track = track;
 }
 
+Node* TextTrackCue::owner() const
+{
+    return m_track ? m_track->owner() : 0;
+}
+
 void TextTrackCue::setId(const AtomicString& id)
 {
     if (m_id == id)