Remove unnecessary finalization of IDBObserver classes.

third_party/WebKit/Source/modules/indexeddb/IDBObserverChanges.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 IDBObserverChanges_h
 #define IDBObserverChanges_h
 
 #include "bindings/core/v8/ScriptValue.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "modules/indexeddb/IDBDatabase.h"
 #include "modules/indexeddb/IDBObservation.h"
 #include "modules/indexeddb/IDBTransaction.h"
 #include "platform/heap/Handle.h"
 #include "public/platform/WebVector.h"
 
 namespace blink {
 
 class ScriptState;
 
-class IDBObserverChanges final : public GarbageCollectedFinalized<IDBObserverChanges>, public ScriptWrappable {
+class IDBObserverChanges final : public GarbageCollected<IDBObserverChanges>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
-
 public:
     static IDBObserverChanges* create(IDBDatabase*, const WebVector<WebIDBObservation>&, const WebVector<int32_t>& observationIndex);
 
     DECLARE_TRACE();
 
     // Implement IDL
     IDBTransaction* transaction() const { return m_transaction.get(); }
     IDBDatabase* database() const { return m_database.get(); }
     ScriptValue records(ScriptState*);
 
 private:
     IDBObserverChanges(IDBDatabase*, const WebVector<WebIDBObservation>&, const WebVector<int32_t>& observationIndex);
 
     void extractChanges(const WebVector<WebIDBObservation>&, const WebVector<int32_t>& observationIndex);
 
     Member<IDBDatabase> m_database;
     Member<IDBTransaction> m_transaction;
     // Map objectStoreId to IDBObservation list.
     HeapHashMap<int64_t, HeapVector<Member<IDBObservation>>> m_records;
 };
 
 } // namespace blink
 
 #endif // IDBObserverChanges_h