Make reduction value of dynamics compressor zero when no sources are connected

Source/modules/webaudio/DynamicsCompressorNode.h

 /*
  * Copyright (C) 2011, 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 30 matching lines @@
         return new DynamicsCompressorNode(context, sampleRate);
     }
 
     virtual ~DynamicsCompressorNode();
 
     // AudioNode
     virtual void dispose() override;
     virtual void process(size_t framesToProcess) override;
     virtual void initialize() override;
     virtual void uninitialize() override;
+    virtual void clearInternalStateWhenDisabled() override;
 
     // Static compression curve parameters.
     AudioParam* threshold() { return m_threshold.get(); }
     AudioParam* knee() { return m_knee.get(); }
     AudioParam* ratio() { return m_ratio.get(); }
     AudioParam* attack() { return m_attack.get(); }
     AudioParam* release() { return m_release.get(); }
 
     // Amount by which the compressor is currently compressing the signal in decibels.
     AudioParam* reduction() { return m_reduction.get(); }
@@ skipping 11 matching lines @@
     Member<AudioParam> m_knee;
     Member<AudioParam> m_ratio;
     Member<AudioParam> m_reduction;
     Member<AudioParam> m_attack;
     Member<AudioParam> m_release;
 };
 
 } // namespace blink
 
 #endif // DynamicsCompressorNode_h