Move the exception logic to the AudioNode creator

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

 /*
  * Copyright (C) 2012, Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1.  Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 47 matching lines @@
     Persistent<MediaStreamSource> m_source;
 
     // This internal mix bus is for up/down mixing the input to the actual
     // number of channels in the destination.
     RefPtr<AudioBus> m_mixBus;
 };
 
 class MediaStreamAudioDestinationNode final : public AudioBasicInspectorNode {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    static MediaStreamAudioDestinationNode* create(AbstractAudioContext&, size_t numberOfChannels);
+    static MediaStreamAudioDestinationNode* create(AbstractAudioContext&, size_t numberOfChannels, ExceptionState&);
     MediaStream* stream() const;
 
 private:
     MediaStreamAudioDestinationNode(AbstractAudioContext&, size_t numberOfChannels);
 };
 
 } // namespace blink
 
 #endif // MediaStreamAudioDestinationNode_h