[SharedArrayBuffer] Prevent SharedArrayBuffer being used in Web APIs

third_party/WebKit/Source/modules/mediasource/SourceBuffer.cpp

Index: third_party/WebKit/Source/modules/mediasource/SourceBuffer.cpp
diff --git a/third_party/WebKit/Source/modules/mediasource/SourceBuffer.cpp b/third_party/WebKit/Source/modules/mediasource/SourceBuffer.cpp
index 039b91e664f8a34d3c2df5000945be1e5818c052..de1d09bed9665ce0af8e39494e0486d51fd58398 100644
--- a/third_party/WebKit/Source/modules/mediasource/SourceBuffer.cpp
+++ b/third_party/WebKit/Source/modules/mediasource/SourceBuffer.cpp
@@ -360,13 +360,15 @@ void SourceBuffer::appendBuffer(DOMArrayBuffer* data,
                        data->byteLength(), exceptionState);
 }
 
-void SourceBuffer::appendBuffer(DOMArrayBufferView* data,
+void SourceBuffer::appendBuffer(const NotShared<DOMArrayBufferView>& data,
                                 ExceptionState& exceptionState) {
-  BLINK_SBLOG << __func__ << " this=" << this << " size=" << data->byteLength();
+  BLINK_SBLOG << __func__ << " this=" << this
+              << " size=" << data.view()->byteLength();
   // Section 3.2 appendBuffer()
   // https://dvcs.w3.org/hg/html-media/raw-file/default/media-source/media-source.html#widl-SourceBuffer-appendBuffer-void-ArrayBufferView-data
-  appendBufferInternal(static_cast<const unsigned char*>(data->baseAddress()),
-                       data->byteLength(), exceptionState);
+  appendBufferInternal(
+      static_cast<const unsigned char*>(data.view()->baseAddress()),
+      data.view()->byteLength(), exceptionState);
 }
 
 void SourceBuffer::abort(ExceptionState& exceptionState) {