Move the exception logic to the AudioNode creator

third_party/WebKit/Source/modules/webaudio/MediaStreamAudioSourceNode.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 55 matching lines @@
 
     Mutex m_processLock;
 
     unsigned m_sourceNumberOfChannels;
 };
 
 class MediaStreamAudioSourceNode final : public AudioSourceNode, public AudioSourceProviderClient {
     DEFINE_WRAPPERTYPEINFO();
     USING_GARBAGE_COLLECTED_MIXIN(MediaStreamAudioSourceNode);
 public:
-    static MediaStreamAudioSourceNode* create(AbstractAudioContext&, MediaStream&, MediaStreamTrack*, PassOwnPtr<AudioSourceProvider>);
+    static MediaStreamAudioSourceNode* create(AbstractAudioContext&, MediaStream&, ExceptionState&);
     DECLARE_VIRTUAL_TRACE();
     MediaStreamAudioSourceHandler& mediaStreamAudioSourceHandler() const;
 
     MediaStream* getMediaStream() const;
 
     // AudioSourceProviderClient functions:
     void setFormat(size_t numberOfChannels, float sampleRate) override;
 
 private:
     MediaStreamAudioSourceNode(AbstractAudioContext&, MediaStream&, MediaStreamTrack*, PassOwnPtr<AudioSourceProvider>);
 };
 
 } // namespace blink
 
 #endif // MediaStreamAudioSourceNode_h