Remove unused AudioParams in PannerNode.

Source/modules/webaudio/PannerNode.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 PannerNode_h
 #define PannerNode_h
 
 #include "platform/audio/AudioBus.h"
 #include "platform/audio/Cone.h"
 #include "platform/audio/Distance.h"
 #include "platform/audio/HRTFDatabaseLoader.h"
 #include "platform/audio/Panner.h"
 #include "modules/webaudio/AudioListener.h"
 #include "modules/webaudio/AudioNode.h"
-#include "modules/webaudio/AudioParam.h"
 #include "platform/geometry/FloatPoint3D.h"
 #include "wtf/HashMap.h"
 #include "wtf/OwnPtr.h"
 
 namespace WebCore {
 
 // PannerNode is an AudioNode with one input and one output.
 // It positions a sound in 3D space, with the exact effect dependent on the panning model.
 // It has a position and an orientation in 3D space which is relative to the position and orientation of the context's AudioListener.
 // A distance effect will attenuate the gain as the position moves away from the listener.
@@ skipping 106 matching lines @@
     FloatPoint3D m_position;
     FloatPoint3D m_orientation;
     FloatPoint3D m_velocity;
 
     // Cached source location information
     FloatPoint3D m_cachedPosition;
     FloatPoint3D m_cachedOrientation;
     FloatPoint3D m_cachedVelocity;
 
     // Gain
-    RefPtr<AudioParam> m_distanceGain;
-    RefPtr<AudioParam> m_coneGain;
     DistanceEffect m_distanceEffect;
     ConeEffect m_coneEffect;
     float m_lastGain;
 
     double m_cachedAzimuth;
     double m_cachedElevation;
     float m_cachedDistanceConeGain;
     double m_cachedDopplerRate;
 
     // Cached listener parameters after processing.
     RefPtr<AudioListener> m_cachedListener;
 
     RefPtr<HRTFDatabaseLoader> m_hrtfDatabaseLoader;
 
     // AudioContext's connection count
     unsigned m_connectionCount;
 
     // Synchronize process() with setting of the panning model, distance model and caching of the source location/orientation info.
     mutable Mutex m_processLock;
 };
 
 } // namespace WebCore
 
 #endif // PannerNode_h