include RefCounted.h where needed, only.

third_party/WebKit/Source/modules/webaudio/AudioNode.h

 /*
  * Copyright (C) 2010, 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:
  * 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 14 matching lines @@
 #ifndef AudioNode_h
 #define AudioNode_h
 
 #include "modules/EventTargetModules.h"
 #include "modules/ModulesExport.h"
 #include "platform/audio/AudioBus.h"
 #include "wtf/Forward.h"
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefPtr.h"
+#include "wtf/ThreadSafeRefCounted.h"
 #include "wtf/Vector.h"
 #include "wtf/build_config.h"
 
 #define DEBUG_AUDIONODE_REFERENCES 0
 
 namespace blink {
 
 class AbstractAudioContext;
 class AudioNode;
 class AudioNodeInput;
@@ skipping 286 matching lines @@
     HeapVector<Member<HeapHashSet<Member<AudioNode>>>> m_connectedNodes;
     // Represents audio node graph with Oilpan references. N-th HeapHashSet
     // represents a set of AudioParam objects connected to this AudioNode's N-th
     // output.
     HeapVector<Member<HeapHashSet<Member<AudioParam>>>> m_connectedParams;
 };
 
 } // namespace blink
 
 #endif // AudioNode_h