Drop [LegacyInterfaceTypeChecking] where trivial in Web Audio

third_party/WebKit/Source/modules/webaudio/AudioBuffer.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
@@ skipping 190 matching lines @@
     return m_channels[channelIndex].get();
 }
 
 void AudioBuffer::copyFromChannel(DOMFloat32Array* destination, long channelNumber, ExceptionState& exceptionState)
 {
     return copyFromChannel(destination, channelNumber, 0, exceptionState);
 }
 
 void AudioBuffer::copyFromChannel(DOMFloat32Array* destination, long channelNumber, unsigned long startInChannel, ExceptionState& exceptionState)
 {
-    if (!destination) {
-        exceptionState.throwDOMException(
-            TypeMismatchError,
-            ExceptionMessages::argumentNullOrIncorrectType(
-                1,
-                "Float32Array"));
-        return;
-    }
-
     if (channelNumber < 0 || channelNumber >= static_cast<long>(m_channels.size())) {
         exceptionState.throwDOMException(
             IndexSizeError,
             ExceptionMessages::indexOutsideRange(
                 "channelNumber",
                 channelNumber,
                 0L,
                 ExceptionMessages::InclusiveBound,
                 static_cast<long>(m_channels.size() - 1),
                 ExceptionMessages::InclusiveBound));
@@ skipping 28 matching lines @@
     memcpy(dst, src + startInChannel, count * sizeof(*src));
 }
 
 void AudioBuffer::copyToChannel(DOMFloat32Array* source, long channelNumber, ExceptionState& exceptionState)
 {
     return copyToChannel(source, channelNumber, 0, exceptionState);
 }
 
 void AudioBuffer::copyToChannel(DOMFloat32Array* source, long channelNumber, unsigned long startInChannel, ExceptionState& exceptionState)
 {
-    if (!source) {
-        exceptionState.throwDOMException(
-            TypeMismatchError,
-            ExceptionMessages::argumentNullOrIncorrectType(
-                1,
-                "Float32Array"));
-        return;
-    }
-
     if (channelNumber < 0 || channelNumber >= static_cast<long>(m_channels.size())) {
         exceptionState.throwDOMException(
             IndexSizeError,
             ExceptionMessages::indexOutsideRange(
                 "channelNumber",
                 channelNumber,
                 0L,
                 ExceptionMessages::InclusiveBound,
                 static_cast<long>(m_channels.size() - 1),
                 ExceptionMessages::InclusiveBound));
@@ skipping 34 matching lines @@
         if (DOMFloat32Array* array = getChannelData(i)) {
             float* data = array->data();
             memset(data, 0, length() * sizeof(*data));
         }
     }
 }
 
 } // namespace blink
 
 #endif // ENABLE(WEB_AUDIO)