bindings: Adds DOMArrayBuffer, etc. as thin wrappers for ArrayBuffer, etc.

Source/core/dom/DOMArrayBufferDeallocationObserver.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/DOMArrayBufferDeallocationObserver.h"
+
+#include "wtf/StdLibExtras.h"
+#include <v8.h>
+
+namespace blink {
+
+DOMArrayBufferDeallocationObserver* DOMArrayBufferDeallocationObserver::instance()
+{
+    DEFINE_STATIC_LOCAL(DOMArrayBufferDeallocationObserver, deallocationObserver, ());
+    return &deallocationObserver;
+}
+
+void DOMArrayBufferDeallocationObserver::arrayBufferDeallocated(unsigned sizeInBytes)
+{
+    v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(-static_cast<int>(sizeInBytes));
+}
+
+void DOMArrayBufferDeallocationObserver::blinkAllocatedMemory(unsigned sizeInBytes)
+{
+    v8::Isolate::GetCurrent()->AdjustAmountOfExternalAllocatedMemory(static_cast<int>(sizeInBytes));
+}
+
+} // namespace blink