Add DOMSharedArrayBuffer type

Source/core/dom/DOMArrayBuffer.cpp

 // Copyright 2014 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.
 
 #include "config.h"
 #include "core/dom/DOMArrayBuffer.h"
 
 #include "bindings/core/v8/DOMDataStore.h"
 #include "bindings/core/v8/V8DOMWrapper.h"
 
@@ skipping 15 matching lines @@
     // wrapper already created and associated must be used.
     v8::Local<v8::Object> associatedWrapper = DOMDataStore::getWrapper(this, isolate);
     if (UNLIKELY(!associatedWrapper.IsEmpty()))
         return associatedWrapper;
 
     return associateWithWrapper(isolate, wrapperTypeInfo, wrapper);
 }
 
 v8::Local<v8::Object> DOMArrayBuffer::associateWithWrapper(v8::Isolate* isolate, const WrapperTypeInfo* wrapperTypeInfo, v8::Local<v8::Object> wrapper)
 {
-    // This function does not set a deallocation observer to the underlying
-    // array buffer.  It's a caller's duty.
-
     return V8DOMWrapper::associateObjectWithWrapper(isolate, this, wrapperTypeInfo, wrapper);
 }
 
 } // namespace blink