Remove ArrayBufferDeallocationObserver

Source/core/dom/DOMArrayBufferDeallocationObserver.cpp

Index: Source/core/dom/DOMArrayBufferDeallocationObserver.cpp
diff --git a/Source/core/dom/DOMArrayBufferDeallocationObserver.cpp b/Source/core/dom/DOMArrayBufferDeallocationObserver.cpp
deleted file mode 100644
index f2d77f119c081534bfdb79147c7a6baf98ed8d19..0000000000000000000000000000000000000000
--- a/Source/core/dom/DOMArrayBufferDeallocationObserver.cpp
+++ /dev/null
@@ -1,29 +0,0 @@
-// 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/Threading.h"
-#include <v8.h>
-
-namespace blink {
-
-DOMArrayBufferDeallocationObserver& DOMArrayBufferDeallocationObserver::instance()
-{
-    AtomicallyInitializedStaticReference(DOMArrayBufferDeallocationObserver, deallocationObserver, new DOMArrayBufferDeallocationObserver);
-    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