Add OfflineAudioDestinationNode

third_party/WebKit/Source/modules/webaudio/OfflineAudioDestinationNode.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 42 matching lines @@
 
     // AudioDestinationHandler
     void startRendering() override;
     void stopRendering() override;
     unsigned long maxChannelCount() const override;
 
     float sampleRate()  const override { return m_renderTarget->sampleRate(); }
 
     size_t renderQuantumFrames() const { return renderQuantumSize; }
 
+    void setChannelCount(unsigned long, ExceptionState&) final;
+    void setChannelCountMode(const String&, ExceptionState&) final;
+
     WebThread* offlineRenderThread();
 
 private:
     OfflineAudioDestinationHandler(AudioNode&, AudioBuffer* renderTarget);
 
     static const size_t renderQuantumSize;
 
     // Set up the rendering and start. After setting the context up, it will
     // eventually call |doOfflineRendering|.
     void startOfflineRendering();
@@ skipping 36 matching lines @@
     // This flag is necessary to distinguish the state of the context between
     // 'created' and 'suspended'. If this flag is false and the current state
     // is 'suspended', it means the context is created and have not started yet.
     bool m_isRenderingStarted;
 
     // This flag indicates whether the rendering should be suspended or not.
     bool m_shouldSuspend;
 };
 
 class OfflineAudioDestinationNode final : public AudioDestinationNode {
+    DEFINE_WRAPPERTYPEINFO();
 public:
     static OfflineAudioDestinationNode* create(BaseAudioContext*, AudioBuffer* renderTarget);
 
 private:
     OfflineAudioDestinationNode(BaseAudioContext&, AudioBuffer* renderTarget);
 };
 
 } // namespace blink
 
 #endif // OfflineAudioDestinationNode_h