Remove ArrayBufferDeallocationObserver

Source/bindings/templates/interface.cpp

Index: Source/bindings/templates/interface.cpp
diff --git a/Source/bindings/templates/interface.cpp b/Source/bindings/templates/interface.cpp
index c736a026d980b26815bb35978f8932c83643e13c..2ea915b76683c64fa1bd50b9bed328f022f6c49f 100644
--- a/Source/bindings/templates/interface.cpp
+++ b/Source/bindings/templates/interface.cpp
@@ -725,12 +725,8 @@ v8::Local<v8::Object> {{v8_class}}::findInstanceInPrototypeChain(v8::Local<v8::V
     // Transfer the ownership of the allocated memory to an ArrayBuffer without
     // copying.
     v8::ArrayBuffer::Contents v8Contents = v8buffer->Externalize();
-    WTF::ArrayBufferContents contents(v8Contents.Data(), v8Contents.ByteLength(), 0);
+    WTF::ArrayBufferContents contents(v8Contents.Data(), v8Contents.ByteLength());
     RefPtr<{{cpp_class}}> buffer = {{cpp_class}}::create(contents);
-    // Since this transfer doesn't allocate new memory, do not call
-    // DOMArrayBufferDeallocationObserver::blinkAllocatedMemory.
-    buffer->buffer()->setDeallocationObserverWithoutAllocationNotification(
-        DOMArrayBufferDeallocationObserver::instance());
     buffer->associateWithWrapper(v8::Isolate::GetCurrent(), buffer->wrapperTypeInfo(), object);
 
     return buffer.get();