Oilpan: Remove GC_INFO_{DEFINE,DECLARE} macros

Source/modules/encryptedmedia/MediaKeySession.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 46 matching lines @@
 // WeakPtr<MediaKeys> is used instead of having MediaKeys and MediaKeySession
 // keep references to each other, and then having to inform the other object
 // when it gets destroyed.
 //
 // Because this object controls the lifetime of the ContentDecryptionModuleSession,
 // it may outlive any references to it as long as the MediaKeys object is alive.
 // The ContentDecryptionModuleSession has the same lifetime as this object.
 class MediaKeySession FINAL
     : public RefCountedWillBeRefCountedGarbageCollected<MediaKeySession>, public ActiveDOMObject, public ScriptWrappable, public EventTargetWithInlineData
     , private ContentDecryptionModuleSessionClient {
-    DECLARE_GC_INFO;
     DEFINE_EVENT_TARGET_REFCOUNTING(RefCountedWillBeRefCountedGarbageCollected<MediaKeySession>);
 public:
     static PassRefPtrWillBeRawPtr<MediaKeySession> create(ExecutionContext*, ContentDecryptionModule*, WeakPtr<MediaKeys>);
     virtual ~MediaKeySession();
 
     const String& keySystem() const { return m_keySystem; }
     String sessionId() const;
 
     void setError(MediaKeyError*);
     MediaKeyError* error() { return m_error.get(); }
@@ skipping 52 matching lines @@
     // Is the CDM finished with this session?
     bool m_isClosed;
 
     Deque<OwnPtr<PendingAction> > m_pendingActions;
     Timer<MediaKeySession> m_actionTimer;
 };
 
 }
 
 #endif // MediaKeySession_h