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

Source/modules/webaudio/DelayProcessor.cpp

Index: Source/modules/webaudio/DelayProcessor.cpp
diff --git a/Source/modules/webaudio/DelayProcessor.cpp b/Source/modules/webaudio/DelayProcessor.cpp
index 0cb2f9950a4b42e8025deeacc0a52ba2db51ac08..2baaa6f5fa28bf31d03a75df9acb881ac1b0edcf 100644
--- a/Source/modules/webaudio/DelayProcessor.cpp
+++ b/Source/modules/webaudio/DelayProcessor.cpp
@@ -45,6 +45,12 @@ DelayProcessor::~DelayProcessor()
         uninitialize();
 }
 
+void DelayProcessor::trace(Visitor* visitor)
+{
+    visitor->trace(m_delayTime);
+    AudioDSPKernelProcessor::trace(visitor);
+}
+
 PassOwnPtr<AudioDSPKernel> DelayProcessor::createKernel()
 {
     return adoptPtr(new DelayDSPKernel(this));