[SharedArrayBuffer] Prevent SharedArrayBuffer being used in Web APIs

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

Index: third_party/WebKit/Source/modules/webaudio/BiquadFilterNode.cpp
diff --git a/third_party/WebKit/Source/modules/webaudio/BiquadFilterNode.cpp b/third_party/WebKit/Source/modules/webaudio/BiquadFilterNode.cpp
index 5b5bb1d158d89531484677ff0645e9f969fb2124..403b79259813480383561d550d0274555bbec3d4 100644
--- a/third_party/WebKit/Source/modules/webaudio/BiquadFilterNode.cpp
+++ b/third_party/WebKit/Source/modules/webaudio/BiquadFilterNode.cpp
@@ -171,12 +171,23 @@ bool BiquadFilterNode::setType(unsigned type) {
   return true;
 }
 
-void BiquadFilterNode::getFrequencyResponse(const DOMFloat32Array* frequencyHz,
-                                            DOMFloat32Array* magResponse,
-                                            DOMFloat32Array* phaseResponse) {
-  DCHECK(frequencyHz);
-  DCHECK(magResponse);
-  DCHECK(phaseResponse);
+void BiquadFilterNode::getFrequencyResponse(
+    const MaybeShared<const DOMFloat32Array>& maybeSharedFrequencyHz,
+    const MaybeShared<DOMFloat32Array>& maybeSharedMagResponse,
+    const MaybeShared<DOMFloat32Array>& maybeSharedPhaseResponse) {
+  DCHECK(maybeSharedFrequencyHz);
+  DCHECK(maybeSharedMagResponse);
+  DCHECK(maybeSharedPhaseResponse);
+
+  if (maybeSharedFrequencyHz.isShared() || maybeSharedMagResponse.isShared() ||
+      maybeSharedPhaseResponse.isShared()) {
+    // TODO(binji): Throw exception?
+    return;
+  }
+
+  const DOMFloat32Array* frequencyHz = maybeSharedFrequencyHz.viewNotShared();
+  DOMFloat32Array* magResponse = maybeSharedMagResponse.viewNotShared();
+  DOMFloat32Array* phaseResponse = maybeSharedPhaseResponse.viewNotShared();
 
   int n = std::min(frequencyHz->length(),
                    std::min(magResponse->length(), phaseResponse->length()));