Move the exception logic to the AudioNode creator

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

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef StereoPannerNode_h
 #define StereoPannerNode_h
 
 #include "base/gtest_prod_util.h"
 #include "modules/webaudio/AudioNode.h"
 #include "modules/webaudio/AudioParam.h"
@@ skipping 24 matching lines @@
     RefPtr<AudioParamHandler> m_pan;
 
     AudioFloatArray m_sampleAccuratePanValues;
 
     FRIEND_TEST_ALL_PREFIXES(StereoPannerNodeTest, StereoPannerLifetime);
 };
 
 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;
 };
 
 } // namespace blink
 
 #endif // StereoPannerNode_h