Move webaudio to oilpan

Source/modules/webaudio/ChannelMergerNode.cpp

Index: Source/modules/webaudio/ChannelMergerNode.cpp
diff --git a/Source/modules/webaudio/ChannelMergerNode.cpp b/Source/modules/webaudio/ChannelMergerNode.cpp
index 39a99011dde3d6c1829681ae8f51d13732408369..4c3adcd83c7bdbfa030f73356fd39c920e906ea0 100644
--- a/Source/modules/webaudio/ChannelMergerNode.cpp
+++ b/Source/modules/webaudio/ChannelMergerNode.cpp
@@ -40,12 +40,12 @@ const unsigned DefaultNumberOfOutputChannels = 1;
 
 namespace WebCore {
 
-PassRefPtr<ChannelMergerNode> ChannelMergerNode::create(AudioContext* context, float sampleRate, unsigned numberOfInputs)
+PassRefPtrWillBeRawPtr<ChannelMergerNode> ChannelMergerNode::create(AudioContext* context, float sampleRate, unsigned numberOfInputs)
 {
     if (!numberOfInputs || numberOfInputs > AudioContext::maxNumberOfChannels())
         return nullptr;
 
-    return adoptRef(new ChannelMergerNode(context, sampleRate, numberOfInputs));
+    return adoptRefWillBeNoop(new ChannelMergerNode(context, sampleRate, numberOfInputs));
 }
 
 ChannelMergerNode::ChannelMergerNode(AudioContext* context, float sampleRate, unsigned numberOfInputs)