ScriptProcessor buffer size should be consistent with callback size

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

Index: third_party/WebKit/Source/modules/webaudio/BaseAudioContext.h
diff --git a/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.h b/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.h
index 4b83dead10c4c39acab8a4fadda766e27e726fac..64defdbe19aa89a2b978154044d54b5192997660 100644
--- a/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.h
+++ b/third_party/WebKit/Source/modules/webaudio/BaseAudioContext.h
@@ -140,6 +140,11 @@ class MODULES_EXPORT BaseAudioContext : public EventTargetWithInlineData,
     return m_destinationNode ? m_destinationNode->handler().sampleRate() : 0;
   }
 
+  size_t callbackBufferSize() const {
+    return m_destinationNode ? m_destinationNode->handler().callbackBufferSize()
+                             : 0;
+  }
+
   String state() const;
   AudioContextState contextState() const { return m_contextState; }
   void throwExceptionForClosedState(ExceptionState&);