Oilpan: WebAudio: Prepare to move AudioProcessor hierarchy to Oilpan heap.

Source/modules/webaudio/BiquadProcessor.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 42 matching lines @@
     if (autoInitialize)
         initialize();
 }
 
 BiquadProcessor::~BiquadProcessor()
 {
     if (isInitialized())
         uninitialize();
 }
 
+void BiquadProcessor::trace(Visitor* visitor)
+{
+    visitor->trace(m_parameter1);
+    visitor->trace(m_parameter2);
+    visitor->trace(m_parameter3);
+    visitor->trace(m_parameter4);
+    AudioDSPKernelProcessor::trace(visitor);
+}
+
 PassOwnPtr<AudioDSPKernel> BiquadProcessor::createKernel()
 {
     return adoptPtr(new BiquadDSPKernel(this));
 }
 
 void BiquadProcessor::checkForDirtyCoefficients()
 {
     // Deal with smoothing / de-zippering. Start out assuming filter parameters are not changing.
 
     // The BiquadDSPKernel objects rely on this value to see if they need to re-compute their internal filter coefficients.
@@ skipping 56 matching lines @@
     // thread on the main kernels.
 
     OwnPtr<BiquadDSPKernel> responseKernel = adoptPtr(new BiquadDSPKernel(this));
 
     responseKernel->getFrequencyResponse(nFrequencies, frequencyHz, magResponse, phaseResponse);
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)