Oilpan: fix build after r359531.

third_party/WebKit/Source/modules/nfc/NFC.h

 // Copyright 2015 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 NFC_h
 #define NFC_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/frame/LocalFrameLifecycleObserver.h"
 #include "core/page/PageLifecycleObserver.h"
 
 namespace blink {
 
 class NFC final
     : public GarbageCollectedFinalized<NFC>
     , public ScriptWrappable
     , public LocalFrameLifecycleObserver
     , public PageLifecycleObserver {
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(NFC);
 
 public:
     static NFC* create(LocalFrame*);
+#if ENABLE(OILPAN)
+    ~NFC();
+#else
     ~NFC() override;
+#endif
 
     // Get an adapter object providing NFC functionality.
     ScriptPromise requestAdapter(ScriptState*);
 
     // Implementation of LocalFrameLifecycleObserver.
     void willDetachFrameHost() override;
 
     // Implementation of PageLifecycleObserver
     void pageVisibilityChanged() override;
 
     // Interface required by garbage collection.
     DECLARE_VIRTUAL_TRACE();
 
 private:
     NFC(LocalFrame*);
 };
 
 } // namespace blink
 
 #endif // NFC_h