Move the exception logic to the AudioNode creator

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

 /*
  * Copyright (C) 2011, 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 82 matching lines @@
 
     // The value of mediaElement()->currentSrc().string() in the ctor and onCurrentSrcChanged().
     // Protected by |m_processLock|.
     String m_currentSrcString;
 };
 
 class MediaElementAudioSourceNode final : public AudioSourceNode, public AudioSourceProviderClient {
     DEFINE_WRAPPERTYPEINFO();
     USING_GARBAGE_COLLECTED_MIXIN(MediaElementAudioSourceNode);
 public:
-    static MediaElementAudioSourceNode* create(AbstractAudioContext&, HTMLMediaElement&);
+    static MediaElementAudioSourceNode* create(AbstractAudioContext&, HTMLMediaElement&, ExceptionState&);
     DECLARE_VIRTUAL_TRACE();
     MediaElementAudioSourceHandler& mediaElementAudioSourceHandler() const;
 
     HTMLMediaElement* mediaElement() const;
 
     // AudioSourceProviderClient functions:
     void setFormat(size_t numberOfChannels, float sampleRate) override;
     void onCurrentSrcChanged(const KURL& currentSrc) override;
     void lock() override;
     void unlock() override;
 
 private:
     MediaElementAudioSourceNode(AbstractAudioContext&, HTMLMediaElement&);
 };
 
 } // namespace blink
 
 #endif // MediaElementAudioSourceNode_h