bindings: Adds virtual ScriptWrappable::wrap method.

Source/core/html/track/VideoTrackList.h

 // 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.
 
 #ifndef VideoTrackList_h
 #define VideoTrackList_h
 
 #include "core/html/track/TrackListBase.h"
 #include "core/html/track/VideoTrack.h"
 
 namespace blink {
 
 class VideoTrackList FINAL : public TrackListBase<VideoTrack> {
+    DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<VideoTrackList> create(HTMLMediaElement&);
 
     virtual ~VideoTrackList();
 
     int selectedIndex() const;
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE;
 
     void trackSelected(blink::WebMediaPlayer::TrackId selectedTrackId);
 
 private:
     explicit VideoTrackList(HTMLMediaElement&);
 };
 
-}
+} // namespace blink
 
-#endif
+#endif // VideoTrackList_h