Oilpan: Remove GC_INFO_{DEFINE,DECLARE} macros

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 36 matching lines @@
 
 namespace WebCore {
 
 class ContentDecryptionModule;
 class HTMLMediaElement;
 class ExceptionState;
 
 // References are held by JS and HTMLMediaElement.
 // The ContentDecryptionModule has the same lifetime as this object.
 class MediaKeys : public RefCountedWillBeGarbageCollectedFinalized<MediaKeys>, public ContextLifecycleObserver, public ScriptWrappable {
-    DECLARE_GC_INFO;
 public:
     static PassRefPtrWillBeRawPtr<MediaKeys> create(ExecutionContext*, const String& keySystem, ExceptionState&);
     ~MediaKeys();
 
     PassRefPtrWillBeRawPtr<MediaKeySession> createSession(ExecutionContext*, const String& contentType, Uint8Array* initData, ExceptionState&);
 
     const String& keySystem() const { return m_keySystem; }
 
     void setMediaElement(HTMLMediaElement*);
 
@@ skipping 27 matching lines @@
     };
     Deque<InitializeNewSessionData> m_pendingInitializeNewSessionData;
     Timer<MediaKeys> m_initializeNewSessionTimer;
 
     WeakPtrFactory<MediaKeys> m_weakFactory;
 };
 
 }
 
 #endif // MediaKeys_h