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 f89b88fdee889e71fcbd62e4c90c8dce1d6c4c6c..ae5bd1554b2949f46e7f8139a0625b3662a42c23 100644
--- a/Source/core/html/track/TextTrack.h
+++ b/Source/core/html/track/TextTrack.h
@@ -35,7 +35,6 @@ namespace WebCore {
 
 class Document;
 class ExceptionState;
-class HTMLMediaElement;
 class TextTrack;
 class TextTrackCue;
 class TextTrackCueList;
@@ -53,7 +52,8 @@ 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 +61,7 @@ public:
     }
     virtual ~TextTrack();
 
-    void setMediaElement(HTMLMediaElement* element) { m_mediaElement = element; }
-    HTMLMediaElement* mediaElement() { return m_mediaElement; }
-
-    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 +70,6 @@ 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 +125,9 @@ 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 +139,6 @@ 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;
     AtomicString m_mode;
     TextTrackClient* m_client;
     TextTrackType m_trackType;