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

Source/modules/webaudio/AudioNode.cpp

 /*
  * 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 71 matching lines @@
 void AudioNode::initialize()
 {
     m_isInitialized = true;
 }
 
 void AudioNode::uninitialize()
 {
     m_isInitialized = false;
 }
 
+void AudioNode::clearInternalState()
+{
+}
+
 void AudioNode::dispose()
 {
     ASSERT(isMainThread());
     ASSERT(context()->isGraphOwner());
 
     context()->removeChangedChannelCountMode(this);
     context()->removeAutomaticPullNode(this);
     context()->disposeOutputs(*this);
     for (unsigned i = 0; i < m_outputs.size(); ++i)
         output(i)->disconnectAll();
@@ skipping 461 matching lines @@
 
 void AudioNode::updateChannelCountMode()
 {
     m_channelCountMode = m_newChannelCountMode;
     updateChannelsForInputs();
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)