bindings: Adds virtual ScriptWrappable::wrap method.

Source/modules/mediasource/MediaSource.h

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 35 matching lines @@
 class ExceptionState;
 class GenericEventQueue;
 class WebSourceBuffer;
 
 class MediaSource FINAL
     : public RefCountedGarbageCollectedWillBeGarbageCollectedFinalized<MediaSource>
     , public HTMLMediaSource
     , public ActiveDOMObject
     , public EventTargetWithInlineData {
     DEFINE_EVENT_TARGET_REFCOUNTING_WILL_BE_REMOVED(RefCountedGarbageCollected<MediaSource>);
+    DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(MediaSource);
 public:
     static const AtomicString& openKeyword();
     static const AtomicString& closedKeyword();
     static const AtomicString& endedKeyword();
 
     static MediaSource* create(ExecutionContext*);
     virtual ~MediaSource();
 
     // MediaSource.idl methods
@@ skipping 63 matching lines @@
     RawPtrWillBeWeakMember<HTMLMediaElement> m_attachedElement;
 
     Member<SourceBufferList> m_sourceBuffers;
     Member<SourceBufferList> m_activeSourceBuffers;
 
     bool m_isAddedToRegistry;
 };
 
 } // namespace blink
 
-#endif
+#endif // MediaSource_h