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

Source/core/html/track/TrackBase.cpp

Index: Source/core/html/track/TrackBase.cpp
diff --git a/Source/core/html/parser/HTMLParserThread.h b/Source/core/html/track/TrackBase.cpp
similarity index 78%
copy from Source/core/html/parser/HTMLParserThread.h
copy to Source/core/html/track/TrackBase.cpp
index e0b85f9399c3856f6881e3fed668477b8a4257c2..a11c065f41080f3d1d9d5b8d9e5b8b5c4a43105d 100644
--- a/Source/core/html/parser/HTMLParserThread.h
+++ b/Source/core/html/track/TrackBase.cpp
@@ -28,27 +28,30 @@
  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  */
 
-#ifndef HTMLParserThread_h
-#define HTMLParserThread_h
-
-#include "wtf/Functional.h"
-#include "wtf/OwnPtr.h"
-#include "public/platform/WebThread.h"
+#include "config.h"
+#include "core/html/track/TrackBase.h"
 
 namespace WebCore {
 
-class HTMLParserThread {
-public:
-    static HTMLParserThread* shared();
-    void postTask(const Closure&);
-
-private:
-    HTMLParserThread();
-    ~HTMLParserThread();
-
-    OwnPtr<blink::WebThread> m_thread;
-};
+TrackBase::TrackBase(Type type, const AtomicString& label, const AtomicString& language, const AtomicString& id)
+    : m_type(type)
+    , m_label(label)
+    , m_language(language)
+    , m_id(id)
+{
+}
+
+TrackBase::~TrackBase()
+{
+}
+
+void TrackBase::setKind(const AtomicString& kind)
+{
+    if (isValidKind(kind))
+        m_kind = kind;
+    else
+        m_kind = defaultKind();
+}
 
 } // namespace WebCore
 
-#endif // HTMLParserThread_h