Fix virtual/override/final usage in Source/modules/.

Source/modules/device_light/DeviceLightEvent.h

 // 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.
 
 #ifndef DeviceLightEvent_h
 #define DeviceLightEvent_h
 
 #include "modules/EventModules.h"
 #include "modules/device_light/DeviceLightEventInit.h"
 #include "platform/heap/Handle.h"
 
 namespace blink {
 
 class DeviceLightEvent final : public Event {
     DEFINE_WRAPPERTYPEINFO();
 public:
-    virtual ~DeviceLightEvent();
+    ~DeviceLightEvent() override;
 
     static PassRefPtrWillBeRawPtr<DeviceLightEvent> create()
     {
         return adoptRefWillBeNoop(new DeviceLightEvent);
     }
     static PassRefPtrWillBeRawPtr<DeviceLightEvent> create(const AtomicString& eventType, double value)
     {
         return adoptRefWillBeNoop(new DeviceLightEvent(eventType, value));
     }
     static PassRefPtrWillBeRawPtr<DeviceLightEvent> create(const AtomicString& eventType, const DeviceLightEventInit& initializer)
     {
         return adoptRefWillBeNoop(new DeviceLightEvent(eventType, initializer));
     }
 
     double value() const { return m_value; }
 
-    virtual const AtomicString& interfaceName() const override;
+    const AtomicString& interfaceName() const override;
 
 private:
     DeviceLightEvent();
     DeviceLightEvent(const AtomicString& eventType, double value);
     DeviceLightEvent(const AtomicString& eventType, const DeviceLightEventInit& initializer);
 
     double m_value;
 };
 
 DEFINE_TYPE_CASTS(DeviceLightEvent, Event, event, event->interfaceName() == EventNames::DeviceLightEvent, event.interfaceName() == EventNames::DeviceLightEvent);
 
 } // namespace blink
 
 #endif // DeviceLightEvent_h