include RefCounted.h where needed, only.

third_party/WebKit/Source/modules/webaudio/AudioParam.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
@@ skipping 17 matching lines @@
 
 #ifndef AudioParam_h
 #define AudioParam_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/dom/DOMTypedArray.h"
 #include "modules/webaudio/AbstractAudioContext.h"
 #include "modules/webaudio/AudioParamTimeline.h"
 #include "modules/webaudio/AudioSummingJunction.h"
 #include "wtf/PassRefPtr.h"
+#include "wtf/ThreadSafeRefCounted.h"
 #include "wtf/text/WTFString.h"
 #include <sys/types.h>
 
 namespace blink {
 
 class AudioNodeOutput;
 
 // AudioParamHandler is an actual implementation of web-exposed AudioParam
 // interface. Each of AudioParam object creates and owns an AudioParamHandler,
 // and it is responsible for all of AudioParam tasks. An AudioParamHandler
@@ skipping 104 matching lines @@
 private:
     AudioParam(AbstractAudioContext&, double defaultValue);
 
     RefPtr<AudioParamHandler> m_handler;
     Member<AbstractAudioContext> m_context;
 };
 
 } // namespace blink
 
 #endif // AudioParam_h