Tried to move AudioSummingJuction to oilpan

Source/modules/webaudio/ConvolverNode.cpp

Index: Source/modules/webaudio/ConvolverNode.cpp
diff --git a/Source/modules/webaudio/ConvolverNode.cpp b/Source/modules/webaudio/ConvolverNode.cpp
index 8f36f915a5145009cad0f4df081b877202b6c642..50b8d71e1bf59dc841e665801abe5659338f4ddd 100644
--- a/Source/modules/webaudio/ConvolverNode.cpp
+++ b/Source/modules/webaudio/ConvolverNode.cpp
@@ -52,7 +52,7 @@ ConvolverNode::ConvolverNode(AudioContext* context, float sampleRate)
     , m_normalize(true)
 {
     ScriptWrappable::init(this);
-    addInput(adoptPtr(new AudioNodeInput(this)));
+    addInput(adoptPtrWillBeNoop(new AudioNodeInput(this)));
     addOutput(adoptPtr(new AudioNodeOutput(this, 2)));
 
     // Node-specific default mixing rules.
@@ -179,6 +179,12 @@ double ConvolverNode::latencyTime() const
     return std::numeric_limits<double>::infinity();
 }
 
+void ConvolverNode::trace(Visitor* visitor)
+{
+    visitor->trace(m_buffer);
+    AudioNode::trace(visitor);
+}
+
 } // namespace WebCore
 
 #endif // ENABLE(WEB_AUDIO)