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

Source/modules/screen_orientation/ScreenOrientation.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 ScreenOrientation_h
 #define ScreenOrientation_h
 
 #include "bindings/core/v8/ScriptWrappable.h"
 #include "core/events/EventTarget.h"
 #include "core/frame/DOMWindowProperty.h"
@@ skipping 12 matching lines @@
 
 class ScreenOrientation final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<ScreenOrientation>
     , public DOMWindowProperty {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(ScreenOrientation);
     DEFINE_WRAPPERTYPEINFO();
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(ScreenOrientation);
 public:
     static ScreenOrientation* create(LocalFrame*);
 
-    virtual ~ScreenOrientation();
+    ~ScreenOrientation() override;
 
     // EventTarget implementation.
-    virtual const WTF::AtomicString& interfaceName() const override;
-    virtual ExecutionContext* executionContext() const override;
+    const WTF::AtomicString& interfaceName() const override;
+    ExecutionContext* executionContext() const override;
 
     String type() const;
     unsigned short angle() const;
 
     void setType(WebScreenOrientationType);
     void setAngle(unsigned short);
 
     ScriptPromise lock(ScriptState*, const AtomicString& orientation);
     void unlock();
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(change);
 
     // Helper being used by this class and LockOrientationCallback.
     static const AtomicString& orientationTypeToString(WebScreenOrientationType);
 
     DECLARE_VIRTUAL_TRACE();
 
 private:
     explicit ScreenOrientation(LocalFrame*);
 
     ScreenOrientationController* controller();
 
     WebScreenOrientationType m_type;
     unsigned short m_angle;
 };
 
 } // namespace blink
 
 #endif // ScreenOrientation_h