Tried to move AudioSummingJuction to oilpan

Source/modules/webaudio/MediaStreamAudioSourceNode.cpp

Index: Source/modules/webaudio/MediaStreamAudioSourceNode.cpp
diff --git a/Source/modules/webaudio/MediaStreamAudioSourceNode.cpp b/Source/modules/webaudio/MediaStreamAudioSourceNode.cpp
index d6f0ee608d35bd71af47d386ccf4aecae1d02c3c..f413a686bb108968837f39b5053ee4059573e307 100644
--- a/Source/modules/webaudio/MediaStreamAudioSourceNode.cpp
+++ b/Source/modules/webaudio/MediaStreamAudioSourceNode.cpp
@@ -35,9 +35,9 @@
 
 namespace WebCore {
 
-PassRefPtr<MediaStreamAudioSourceNode> MediaStreamAudioSourceNode::create(AudioContext* context, MediaStream* mediaStream, MediaStreamTrack* audioTrack, PassOwnPtr<AudioSourceProvider> audioSourceProvider)
+PassRefPtrWillBeRawPtr<MediaStreamAudioSourceNode> MediaStreamAudioSourceNode::create(AudioContext* context, MediaStream* mediaStream, MediaStreamTrack* audioTrack, PassOwnPtr<AudioSourceProvider> audioSourceProvider)
 {
-    return adoptRef(new MediaStreamAudioSourceNode(context, mediaStream, audioTrack, audioSourceProvider));
+    return adoptRefWillBeNoop(new MediaStreamAudioSourceNode(context, mediaStream, audioTrack, audioSourceProvider));
 }
 
 MediaStreamAudioSourceNode::MediaStreamAudioSourceNode(AudioContext* context, MediaStream* mediaStream, MediaStreamTrack* audioTrack, PassOwnPtr<AudioSourceProvider> audioSourceProvider)