[SharedArrayBuffer] Add "AllowShared" extended attribute, used for WebGL

third_party/WebKit/Source/modules/webgl/WebGLGetBufferSubDataAsync.h

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef WebGLGetBufferSubDataAsync_h
 #define WebGLGetBufferSubDataAsync_h
 
 #include "bindings/core/v8/ScriptPromise.h"
-#include "core/dom/NotShared.h"
+#include "core/dom/ArrayBufferViewHelpers.h"
 #include "modules/webgl/WebGLExtension.h"
 
 namespace blink {
 
 class WebGL2RenderingContextBase;
 
 class WebGLGetBufferSubDataAsync final : public WebGLExtension {
   DEFINE_WRAPPERTYPEINFO();
 
  public:
@@ skipping 44 matching lines @@
   Member<DOMArrayBufferView> destination_array_buffer_view_;
   // Pointer into the offset into destinationArrayBufferView.
   void* destination_data_ptr_;
   // Size in bytes of the copy operation being performed.
   long long destination_byte_length_;
 };
 
 }  // namespace blink
 
 #endif  // WebGLGetBufferSubDataAsync_h