Implement tail processing for AudioNodes

third_party/WebKit/Source/platform/audio/Panner.h

 /*
  * Copyright (C) 2009 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
@@ skipping 57 matching lines @@
                                            double* elevation,
                                            const AudioBus* input_bus,
                                            AudioBus* output_bus,
                                            size_t frames_to_process,
                                            AudioBus::ChannelInterpretation) = 0;
 
   virtual void Reset() = 0;
 
   virtual double TailTime() const = 0;
   virtual double LatencyTime() const = 0;
+  virtual bool RequiresTailProcessing() const = 0;
 
  protected:
   Panner(PanningModel model) : panning_model_(model) {}
 
   PanningModel panning_model_;
 };
 
 }  // namespace blink
 
 #endif  // Panner_h