Move the exception logic to the AudioNode creator

third_party/WebKit/Source/modules/webaudio/StereoPannerNode.h

Index: third_party/WebKit/Source/modules/webaudio/StereoPannerNode.h
diff --git a/third_party/WebKit/Source/modules/webaudio/StereoPannerNode.h b/third_party/WebKit/Source/modules/webaudio/StereoPannerNode.h
index 16283e62c584fc34d3d582fc519dea200824d255..32f1d9b10920b3b01eeb4dba719b6ae48e378702 100644
--- a/third_party/WebKit/Source/modules/webaudio/StereoPannerNode.h
+++ b/third_party/WebKit/Source/modules/webaudio/StereoPannerNode.h
@@ -42,13 +42,13 @@ private:
 class StereoPannerNode final : public AudioNode {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static StereoPannerNode* create(AbstractAudioContext&, float sampleRate);
+    static StereoPannerNode* create(AbstractAudioContext&, ExceptionState&);
     DECLARE_VIRTUAL_TRACE();
 
     AudioParam* pan() const;
 
 private:
-    StereoPannerNode(AbstractAudioContext&, float sampleRate);
+    StereoPannerNode(AbstractAudioContext&);
 
     Member<AudioParam> m_pan;
 };