bindings: Adds virtual ScriptWrappable::wrap method.

Source/core/html/track/AudioTrackList.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 AudioTrackList_h
 #define AudioTrackList_h
 
 #include "core/html/track/AudioTrack.h"
 #include "core/html/track/TrackListBase.h"
 
 namespace blink {
 
 class AudioTrackList FINAL : public TrackListBase<AudioTrack> {
+    DEFINE_WRAPPERTYPEINFO();
 public:
     static PassRefPtrWillBeRawPtr<AudioTrackList> create(HTMLMediaElement&);
 
     virtual ~AudioTrackList();
 
     bool hasEnabledTrack() const;
 
     // EventTarget
     virtual const AtomicString& interfaceName() const OVERRIDE;
 
 private:
     explicit AudioTrackList(HTMLMediaElement&);
 };
 
-}
+} // namespace blink
 
-#endif
+#endif // AudioTrackList_h