ScriptProcessor buffer size should be consistent with callback size

third_party/WebKit/Source/modules/webaudio/AudioNode.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 211 matching lines @@
   ChannelCountMode internalChannelCountMode() const {
     return m_channelCountMode;
   }
   AudioBus::ChannelInterpretation internalChannelInterpretation() const {
     return m_channelInterpretation;
   }
 
   void updateChannelCountMode();
   void updateChannelInterpretation();
 
+  // Default callbackBufferSize should be the render quantum size
+  virtual size_t callbackBufferSize() const {
+    return AudioUtilities::kRenderQuantumFrames;
+  }
+
  protected:
   // Inputs and outputs must be created before the AudioHandler is
   // initialized.
   void addInput();
   void addOutput(unsigned numberOfChannels);
 
   // Called by processIfNecessary() to cause all parts of the rendering graph
   // connected to us to process.  Each rendering quantum, the audio data for
   // each of the AudioNode's inputs will be available after this method is
   // called.  Called from context's audio thread.
@@ skipping 123 matching lines @@
   HeapVector<Member<HeapHashSet<Member<AudioNode>>>> m_connectedNodes;
   // Represents audio node graph with Oilpan references. N-th HeapHashSet
   // represents a set of AudioParam objects connected to this AudioNode's N-th
   // output.
   HeapVector<Member<HeapHashSet<Member<AudioParam>>>> m_connectedParams;
 };
 
 }  // namespace blink
 
 #endif  // AudioNode_h