bindings: Adds virtual ScriptWrappable::wrap method.

Source/modules/encryptedmedia/MediaKeys.h

 /*
  * Copyright (C) 2013 Apple 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:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 15 matching lines @@
 #ifndef MediaKeys_h
 #define MediaKeys_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/ContextLifecycleObserver.h"
 #include "wtf/Forward.h"
 #include "wtf/text/WTFString.h"
 
 namespace blink {
-class WebContentDecryptionModule;
-}
-
-namespace blink {
 
 class ExceptionState;
 class ExecutionContext;
 class HTMLMediaElement;
 class ScriptState;
+class WebContentDecryptionModule;
 
 // References are held by JS and HTMLMediaElement.
 // The WebContentDecryptionModule has the same lifetime as this object.
 class MediaKeys : public GarbageCollectedFinalized<MediaKeys>, public ContextLifecycleObserver, public ScriptWrappable {
+    DEFINE_WRAPPERTYPEINFO();
 public:
     static ScriptPromise create(ScriptState*, const String& keySystem);
     virtual ~MediaKeys();
 
     const String& keySystem() const { return m_keySystem; }
 
     ScriptPromise createSession(ScriptState*, const String& initDataType, ArrayBuffer* initData, const String& sessionType);
     ScriptPromise createSession(ScriptState*, const String& initDataType, ArrayBufferView* initData, const String& sessionType);
 
     static bool isTypeSupported(const String& keySystem, const String& contentType);
 
     blink::WebContentDecryptionModule* contentDecryptionModule();
 
     void trace(Visitor*);
 
     // ContextLifecycleObserver
     virtual void contextDestroyed() OVERRIDE;
 
 private:
     friend class MediaKeysInitializer;
     MediaKeys(ExecutionContext*, const String& keySystem, PassOwnPtr<blink::WebContentDecryptionModule>);
 
     ScriptPromise createSessionInternal(ScriptState*, const String& initDataType, PassRefPtr<ArrayBuffer> initData, const String& sessionType);
 
     const String m_keySystem;
     OwnPtr<blink::WebContentDecryptionModule> m_cdm;
 };
 
-}
+} // namespace blink
 
 #endif // MediaKeys_h