Move code that applies to audio and video tracks into TrackBase.

Source/core/html/track/TextTrack.h

Index: Source/core/html/track/TextTrack.h
diff --git a/Source/core/html/track/TextTrack.h b/Source/core/html/track/TextTrack.h
index 721c55566b031eea4173915049b677c0fea857f5..c430c8374192f9b2d1c13131aff313769df58357 100644
--- a/Source/core/html/track/TextTrack.h
+++ b/Source/core/html/track/TextTrack.h
@@ -28,6 +28,7 @@
 #define TextTrack_h
 
 #include "bindings/v8/ScriptWrappable.h"
+#include "core/events/EventTarget.h"
 #include "core/html/track/TrackBase.h"
 #include "wtf/text/WTFString.h"
 
@@ -39,6 +40,7 @@ class HTMLMediaElement;
 class TextTrack;
 class TextTrackCue;
 class TextTrackCueList;
+class TextTrackList;
 class VTTRegion;
 class VTTRegionList;
 
@@ -53,7 +55,8 @@ public:
     virtual void textTrackRemoveCue(TextTrack*, PassRefPtr<TextTrackCue>) = 0;
 };
 
-class TextTrack : public TrackBase, public ScriptWrappable {
+class TextTrack : public TrackBase, public ScriptWrappable, public EventTargetWithInlineData {
+    REFCOUNTED_EVENT_TARGET(TrackBase);
 public:
     static PassRefPtr<TextTrack> create(Document& document, TextTrackClient* client, const AtomicString& kind, const AtomicString& label, const AtomicString& language)
     {
@@ -61,11 +64,10 @@ public:
     }
     virtual ~TextTrack();
 
-    void setMediaElement(HTMLMediaElement* element) { m_mediaElement = element; }
-    HTMLMediaElement* mediaElement() { return m_mediaElement; }
+    void setTrackList(TextTrackList* trackList) { m_trackList = trackList; }
+    TextTrackList* trackList() { return m_trackList; }
 
-    const AtomicString& kind() const { return m_kind; }
-    void setKind(const AtomicString&);
+    virtual void setKind(const AtomicString&) OVERRIDE;
 
     static const AtomicString& subtitlesKeyword();
     static const AtomicString& captionsKeyword();
@@ -74,15 +76,6 @@ public:
     static const AtomicString& metadataKeyword();
     static bool isValidKindKeyword(const AtomicString&);
 
-    AtomicString label() const { return m_label; }
-    void setLabel(const AtomicString& label) { m_label = label; }
-
-    AtomicString language() const { return m_language; }
-    void setLanguage(const AtomicString& language) { m_language = language; }
-
-    AtomicString id() const { return m_id; }
-    void setId(const AtomicString& id) { m_id = id; }
-
     static const AtomicString& disabledKeyword();
     static const AtomicString& hiddenKeyword();
     static const AtomicString& showingKeyword();
@@ -138,6 +131,9 @@ public:
 protected:
     TextTrack(Document&, TextTrackClient*, const AtomicString& kind, const AtomicString& label, const AtomicString& language, const AtomicString& id, TextTrackType);
 
+    virtual bool isValidKind(const AtomicString& kind) const OVERRIDE { return isValidKindKeyword(kind); }
+    virtual AtomicString defaultKind() const OVERRIDE { return subtitlesKeyword(); }
+
     RefPtr<TextTrackCueList> m_cues;
 
 private:
@@ -149,11 +145,7 @@ private:
     // FIXME: Remove this pointer and get the Document from m_client
     Document* m_document;
 
-    HTMLMediaElement* m_mediaElement;
-    AtomicString m_kind;
-    AtomicString m_label;
-    AtomicString m_language;
-    AtomicString m_id;
+    TextTrackList* m_trackList;
     AtomicString m_mode;
     TextTrackClient* m_client;
     TextTrackType m_trackType;