Enable Oilpan by default for webaudio/

Source/modules/webaudio/AudioNodeInput.cpp

Index: Source/modules/webaudio/AudioNodeInput.cpp
diff --git a/Source/modules/webaudio/AudioNodeInput.cpp b/Source/modules/webaudio/AudioNodeInput.cpp
index 8e5b06dd31df8c231565888cfdbc2fb947617381..6620ec44e12e159f113ed274ee709b7aa7379ea0 100644
--- a/Source/modules/webaudio/AudioNodeInput.cpp
+++ b/Source/modules/webaudio/AudioNodeInput.cpp
@@ -42,9 +42,9 @@ inline AudioNodeInput::AudioNodeInput(AudioNode& node)
     m_internalSummingBus = AudioBus::create(1, AudioNode::ProcessingSizeInFrames);
 }
 
-PassOwnPtrWillBeRawPtr<AudioNodeInput> AudioNodeInput::create(AudioNode& node)
+AudioNodeInput* AudioNodeInput::create(AudioNode& node)
 {
-    return adoptPtrWillBeNoop(new AudioNodeInput(node));
+    return new AudioNodeInput(node);
 }
 
 void AudioNodeInput::trace(Visitor* visitor)