Implement tail processing for AudioNodes

third_party/WebKit/Source/platform/audio/AudioDelayDSPKernel.cpp

 /*
  * 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 145 matching lines @@
 
     *destination++ = static_cast<float>(output);
   }
 }
 
 void AudioDelayDSPKernel::Reset() {
   first_time_ = true;
   buffer_.Zero();
 }
 
+bool AudioDelayDSPKernel::RequiresTailProcessing() const {
+  // Always return true even if the tail time and latency might both
+  // be zero.
+  return true;
+}
+
 double AudioDelayDSPKernel::TailTime() const {
   // Account for worst case delay.
   // Don't try to track actual delay time which can change dynamically.
   return max_delay_time_;
 }
 
 double AudioDelayDSPKernel::LatencyTime() const {
   return 0;
 }
 
 }  // namespace blink