Make ConvolverNode conform to spec

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

 /*
  * Copyright (C) 2010, 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 29 matching lines @@
 class ExceptionState;
 class Reverb;
 
 class MODULES_EXPORT ConvolverHandler final : public AudioHandler {
  public:
   static PassRefPtr<ConvolverHandler> create(AudioNode&, float sampleRate);
   ~ConvolverHandler() override;
 
   // AudioHandler
   void process(size_t framesToProcess) override;
+  // Called in the main thread when the number of channels for the input may
+  // have changed.
+  void checkNumberOfChannelsForInput(AudioNodeInput*) override;
 
   // Impulse responses
   void setBuffer(AudioBuffer*, ExceptionState&);
   AudioBuffer* buffer();
 
   bool normalize() const { return m_normalize; }
   void setNormalize(bool normalize) { m_normalize = normalize; }
+  void setChannelCount(unsigned long, ExceptionState&) final;
+  void setChannelCountMode(const String&, ExceptionState&) final;
 
  private:
   ConvolverHandler(AudioNode&, float sampleRate);
   double tailTime() const override;
   double latencyTime() const override;
 
   std::unique_ptr<Reverb> m_reverb;
   // This Persistent doesn't make a reference cycle including the owner
   // ConvolverNode.
   // It is cross-thread, as it will be accessed by the audio and main threads.
@@ skipping 26 matching lines @@
  private:
   ConvolverNode(BaseAudioContext&);
   ConvolverHandler& convolverHandler() const;
 
   FRIEND_TEST_ALL_PREFIXES(ConvolverNodeTest, ReverbLifetime);
 };
 
 }  // namespace blink
 
 #endif  // ConvolverNode_h