ScriptProcessor buffer size should be consistent with callback size

third_party/WebKit/Source/platform/audio/AudioDestination.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
@@ skipping 74 matching lines @@
               size_t numberOfFrames,
               double delay,
               double delayTimestamp,
               size_t priorFramesSkipped) override;
 
   // AudioSourceProvider
   void provideInput(AudioBus*, size_t framesToProcess) override;
 
   static float hardwareSampleRate();
 
+  size_t callbackBufferSize() const { return m_callbackBufferSize; }
+
   // maxChannelCount() returns the total number of output channels of the audio
   // hardware.  A value of 0 indicates that the number of channels cannot be
   // configured and that only stereo (2-channel) destinations can be created.
   // The numberOfOutputChannels parameter of AudioDestination::create() is
   // allowed to be a value: 1 <= numberOfOutputChannels <= maxChannelCount(),
   // or if maxChannelCount() equals 0, then numberOfOutputChannels must be 2.
   static unsigned long maxChannelCount();
 
  private:
   AudioIOCallback& m_callback;
   unsigned m_numberOfOutputChannels;
   RefPtr<AudioBus> m_inputBus;
   RefPtr<AudioBus> m_renderBus;
   float m_sampleRate;
   bool m_isPlaying;
   std::unique_ptr<WebAudioDevice> m_audioDevice;
   size_t m_callbackBufferSize;
 
   std::unique_ptr<AudioFIFO> m_inputFifo;
   std::unique_ptr<AudioPullFIFO> m_fifo;
 
   size_t m_framesElapsed;
   AudioIOPosition m_outputPosition;
   base::TimeTicks m_outputPositionReceivedTimestamp;
 };
 
 }  // namespace blink
 
 #endif  // AudioDestination_h