Ensure that ArrayBuffers actively being used by the Web Audio API cannot be neutered

Source/modules/webaudio/AudioBuffer.cpp

Index: Source/modules/webaudio/AudioBuffer.cpp
diff --git a/Source/modules/webaudio/AudioBuffer.cpp b/Source/modules/webaudio/AudioBuffer.cpp
index d01c8c6d812b672dd146005e749bcce25996636c..0ab62ca1c1b27e2b9c1f64f87f2b5fc138e87c18 100644
--- a/Source/modules/webaudio/AudioBuffer.cpp
+++ b/Source/modules/webaudio/AudioBuffer.cpp
@@ -67,6 +67,7 @@ AudioBuffer::AudioBuffer(unsigned numberOfChannels, size_t numberOfFrames, float
 
     for (unsigned i = 0; i < numberOfChannels; ++i) {
         RefPtr<Float32Array> channelDataArray = Float32Array::create(m_length);
+        channelDataArray->setNeuterable(false);
         m_channels.append(channelDataArray);
     }
 }
@@ -82,6 +83,7 @@ AudioBuffer::AudioBuffer(AudioBus* bus)
     m_channels.reserveCapacity(numberOfChannels);
     for (unsigned i = 0; i < numberOfChannels; ++i) {
         RefPtr<Float32Array> channelDataArray = Float32Array::create(m_length);
+        channelDataArray->setNeuterable(false);
         channelDataArray->setRange(bus->channel(i)->data(), m_length, 0);
         m_channels.append(channelDataArray);
     }
@@ -92,14 +94,15 @@ void AudioBuffer::releaseMemory()
     m_channels.clear();
 }
 
-Float32Array* AudioBuffer::getChannelData(unsigned channelIndex, ExceptionState& es)
+PassRefPtr<Float32Array> AudioBuffer::getChannelData(unsigned channelIndex, ExceptionState& es)
 {
     if (channelIndex >= m_channels.size()) {
         es.throwDOMException(SyntaxError);
         return 0;
     }
 
-    return m_channels[channelIndex].get();
+    Float32Array* channelData = m_channels[channelIndex].get();
+    return Float32Array::create(channelData->buffer(), channelData->byteOffset(), channelData->length());
 }
 
 Float32Array* AudioBuffer::getChannelData(unsigned channelIndex)