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

Source/modules/webaudio/DelayProcessor.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 27 matching lines @@
 {
     m_delayTime = AudioParam::create(context, "delayTime", 0.0, 0.0, maxDelayTime);
 }
 
 DelayProcessor::~DelayProcessor()
 {
     if (isInitialized())
         uninitialize();
 }
 
+void DelayProcessor::trace(Visitor* visitor)
+{
+    visitor->trace(m_delayTime);
+    AudioDSPKernelProcessor::trace(visitor);
+}
+
 PassOwnPtr<AudioDSPKernel> DelayProcessor::createKernel()
 {
     return adoptPtr(new DelayDSPKernel(this));
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)