Oilpan: Remove GC_INFO_{DEFINE,DECLARE} macros

Source/modules/mediasource/MediaSourceBase.cpp

 /*
  * 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 50 matching lines @@
     if (isUpdating) {
         exceptionState.throwDOMException(InvalidStateError, "The 'updating' attribute is true on one or more of this MediaSource's SourceBuffers.");
         return true;
     }
 
     return false;
 }
 
 } // namespace
 
-DEFINE_GC_INFO(MediaSourceBase);
-
 MediaSourceBase::MediaSourceBase(ExecutionContext* context)
     : ActiveDOMObject(context)
     , m_readyState(closedKeyword())
     , m_asyncEventQueue(GenericEventQueue::create(this))
     , m_attachedElement(0)
 {
 }
 
 MediaSourceBase::~MediaSourceBase()
 {
@@ skipping 266 matching lines @@
 {
     return ActiveDOMObject::executionContext();
 }
 
 URLRegistry& MediaSourceBase::registry() const
 {
     return MediaSourceRegistry::registry();
 }
 
 }