ScriptProcessor buffer size should be consistent with callback size

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

Index: third_party/WebKit/Source/platform/audio/AudioDestination.h
diff --git a/third_party/WebKit/Source/platform/audio/AudioDestination.h b/third_party/WebKit/Source/platform/audio/AudioDestination.h
index dda3527f57476e3697025958418f64c07573959d..f97d13a728ae6f7d67d904f0f5d7ddf5816cc924 100644
--- a/third_party/WebKit/Source/platform/audio/AudioDestination.h
+++ b/third_party/WebKit/Source/platform/audio/AudioDestination.h
@@ -89,6 +89,8 @@ class PLATFORM_EXPORT AudioDestination : public WebAudioDevice::RenderCallback,
 
   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.