Remove unnecessary finalization of IDBObserver classes.

third_party/WebKit/Source/modules/indexeddb/IDBObserver.h

Index: third_party/WebKit/Source/modules/indexeddb/IDBObserver.h
diff --git a/third_party/WebKit/Source/modules/indexeddb/IDBObserver.h b/third_party/WebKit/Source/modules/indexeddb/IDBObserver.h
index 16f38a2743d4e68fa79548aefa0dd05e17e557bb..538995bc8b907504792f182bd8b46a0514bd1308 100644
--- a/third_party/WebKit/Source/modules/indexeddb/IDBObserver.h
+++ b/third_party/WebKit/Source/modules/indexeddb/IDBObserver.h
@@ -15,19 +15,19 @@ namespace blink {
 class IDBObserverCallback;
 class IDBObserverInit;
 
-class IDBObserver final : public GarbageCollectedFinalized<IDBObserver>, public ScriptWrappable {
+class IDBObserver final : public GarbageCollected<IDBObserver>, public ScriptWrappable {
     DEFINE_WRAPPERTYPEINFO();
 
 public:
     static IDBObserver* create(IDBObserverCallback&, const IDBObserverInit&);
-    ~IDBObserver();
+
     // API methods
     void observe(IDBDatabase*, IDBTransaction*, ExceptionState&);
 
     DECLARE_TRACE();
 
 private:
-    explicit IDBObserver(IDBObserverCallback&, const IDBObserverInit&);
+    IDBObserver(IDBObserverCallback&, const IDBObserverInit&);
 
     Member<IDBObserverCallback> m_callback;
     bool m_transaction;