Implement tail processing for AudioNodes

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

 /*
  * Copyright (C) 2012, 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 39 matching lines @@
   void Process(size_t frames_to_process) override;
 
   // AudioNode
   double TailTime() const override { return 0; }
   double LatencyTime() const override { return 0; }
 
   // A helper for AudioSourceProviderClient implementation of
   // MediaStreamAudioSourceNode.
   void SetFormat(size_t number_of_channels, float sample_rate);
 
+  bool RequiresTailProcessing() const override { return false; }
+
  private:
   MediaStreamAudioSourceHandler(AudioNode&,
                                 std::unique_ptr<AudioSourceProvider>);
 
   // As an audio source, we will never propagate silence.
   bool PropagatesSilence() const override { return false; }
 
   AudioSourceProvider* GetAudioSourceProvider() const {
     return audio_source_provider_.get();
   }
@@ skipping 34 matching lines @@
 
   MediaStreamAudioSourceHandler& GetMediaStreamAudioSourceHandler() const;
 
   Member<MediaStreamTrack> audio_track_;
   Member<MediaStream> media_stream_;
 };
 
 }  // namespace blink
 
 #endif  // MediaStreamAudioSourceNode_h