Tried to move AudioSummingJuction to oilpan

Source/modules/webaudio/DynamicsCompressorNode.cpp

Index: Source/modules/webaudio/DynamicsCompressorNode.cpp
diff --git a/Source/modules/webaudio/DynamicsCompressorNode.cpp b/Source/modules/webaudio/DynamicsCompressorNode.cpp
index 8f4fd02758f73ee615da9217003e6b1816b2995d..64d7ba2941fb3cfc77d2935efb9f35ca5f364c64 100644
--- a/Source/modules/webaudio/DynamicsCompressorNode.cpp
+++ b/Source/modules/webaudio/DynamicsCompressorNode.cpp
@@ -42,7 +42,7 @@ DynamicsCompressorNode::DynamicsCompressorNode(AudioContext* context, float samp
     : AudioNode(context, sampleRate)
 {
     ScriptWrappable::init(this);
-    addInput(adoptPtr(new AudioNodeInput(this)));
+    addInput(adoptPtrWillBeNoop(new AudioNodeInput(this)));
     addOutput(adoptPtr(new AudioNodeOutput(this, defaultNumberOfOutputChannels)));
 
     setNodeType(NodeTypeDynamicsCompressor);
@@ -113,6 +113,17 @@ double DynamicsCompressorNode::latencyTime() const
     return m_dynamicsCompressor->latencyTime();
 }
 
+void DynamicsCompressorNode::trace(Visitor* visitor)
+{
+    visitor->trace(m_threshold);
+    visitor->trace(m_knee);
+    visitor->trace(m_ratio);
+    visitor->trace(m_reduction);
+    visitor->trace(m_attack);
+    visitor->trace(m_release);
+    AudioNode::trace(visitor);
+}
+
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)