[SharedArrayBuffer] Prevent SharedArrayBuffer being used in Web APIs

third_party/WebKit/Source/modules/webaudio/AudioBuffer.cpp

Index: third_party/WebKit/Source/modules/webaudio/AudioBuffer.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/AudioBuffer.cpp b/third_party/WebKit/Source/modules/webaudio/AudioBuffer.cpp
index 294a59f0536253049358697418b8dfca28c54bce..1b9a5ccc920b5e9a259c27232f56518b773cc621 100644
--- a/third_party/WebKit/Source/modules/webaudio/AudioBuffer.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/AudioBuffer.cpp
@@ -183,33 +183,34 @@ AudioBuffer::AudioBuffer(AudioBus* bus)
   }
 }
 
-DOMFloat32Array* AudioBuffer::getChannelData(unsigned channelIndex,
-                                             ExceptionState& exceptionState) {
+NotShared<DOMFloat32Array> AudioBuffer::getChannelData(
+    unsigned channelIndex,
+    ExceptionState& exceptionState) {
   if (channelIndex >= m_channels.size()) {
     exceptionState.throwDOMException(
         IndexSizeError, "channel index (" + String::number(channelIndex) +
                             ") exceeds number of channels (" +
                             String::number(m_channels.size()) + ")");
-    return nullptr;
+    return NotShared<DOMFloat32Array>(nullptr);
   }
 
   return getChannelData(channelIndex);
 }
 
-DOMFloat32Array* AudioBuffer::getChannelData(unsigned channelIndex) {
+NotShared<DOMFloat32Array> AudioBuffer::getChannelData(unsigned channelIndex) {
   if (channelIndex >= m_channels.size())
-    return nullptr;
+    return NotShared<DOMFloat32Array>(nullptr);
 
-  return m_channels[channelIndex].get();
+  return NotShared<DOMFloat32Array>(m_channels[channelIndex].get());
 }
 
-void AudioBuffer::copyFromChannel(DOMFloat32Array* destination,
+void AudioBuffer::copyFromChannel(NotShared<DOMFloat32Array> destination,
                                   long channelNumber,
                                   ExceptionState& exceptionState) {
   return copyFromChannel(destination, channelNumber, 0, exceptionState);
 }
 
-void AudioBuffer::copyFromChannel(DOMFloat32Array* destination,
+void AudioBuffer::copyFromChannel(NotShared<DOMFloat32Array> destination,
                                   long channelNumber,
                                   unsigned long startInChannel,
                                   ExceptionState& exceptionState) {
@@ -238,10 +239,10 @@ void AudioBuffer::copyFromChannel(DOMFloat32Array* destination,
   }
 
   unsigned count = channelData->length() - startInChannel;
-  count = std::min(destination->length(), count);
+  count = std::min(destination.view()->length(), count);
 
   const float* src = channelData->data();
-  float* dst = destination->data();
+  float* dst = destination.view()->data();
 
   DCHECK(src);
   DCHECK(dst);
@@ -249,13 +250,13 @@ void AudioBuffer::copyFromChannel(DOMFloat32Array* destination,
   memcpy(dst, src + startInChannel, count * sizeof(*src));
 }
 
-void AudioBuffer::copyToChannel(DOMFloat32Array* source,
+void AudioBuffer::copyToChannel(NotShared<DOMFloat32Array> source,
                                 long channelNumber,
                                 ExceptionState& exceptionState) {
   return copyToChannel(source, channelNumber, 0, exceptionState);
 }
 
-void AudioBuffer::copyToChannel(DOMFloat32Array* source,
+void AudioBuffer::copyToChannel(NotShared<DOMFloat32Array> source,
                                 long channelNumber,
                                 unsigned long startInChannel,
                                 ExceptionState& exceptionState) {
@@ -284,9 +285,9 @@ void AudioBuffer::copyToChannel(DOMFloat32Array* source,
   }
 
   unsigned count = channelData->length() - startInChannel;
-  count = std::min(source->length(), count);
+  count = std::min(source.view()->length(), count);
 
-  const float* src = source->data();
+  const float* src = source.view()->data();
   float* dst = channelData->data();
 
   DCHECK(src);
@@ -297,8 +298,8 @@ void AudioBuffer::copyToChannel(DOMFloat32Array* source,
 
 void AudioBuffer::zero() {
   for (unsigned i = 0; i < m_channels.size(); ++i) {
-    if (DOMFloat32Array* array = getChannelData(i)) {
-      float* data = array->data();
+    if (NotShared<DOMFloat32Array> array = getChannelData(i)) {
+      float* data = array.view()->data();
       memset(data, 0, length() * sizeof(*data));
     }
   }