Implement tail processing for AudioNodes

third_party/WebKit/Source/modules/webaudio/GainNode.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 36 matching lines @@
                                         AudioParamHandler& gain);
 
   // AudioHandler
   void Process(size_t frames_to_process) override;
   void ProcessOnlyAudioParams(size_t frames_to_process) override;
 
   // Called in the main thread when the number of channels for the input may
   // have changed.
   void CheckNumberOfChannelsForInput(AudioNodeInput*) override;
 
-  // AudioNode
   double TailTime() const override { return 0; }
   double LatencyTime() const override { return 0; }
+  bool RequiresTailProcessing() const override { return false; }
 
  private:
   GainHandler(AudioNode&, float sample_rate, AudioParamHandler& gain);
 
   float last_gain_;  // for de-zippering
   RefPtr<AudioParamHandler> gain_;
 
   AudioFloatArray sample_accurate_gain_values_;
 };
 
@@ skipping 11 matching lines @@
 
  private:
   GainNode(BaseAudioContext&);
 
   Member<AudioParam> gain_;
 };
 
 }  // namespace blink
 
 #endif  // GainNode_h