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

Source/modules/presentation/Presentation.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 Presentation_h
 #define Presentation_h
 
 #include "bindings/core/v8/ScriptPromise.h"
 #include "core/events/EventTarget.h"
 #include "core/frame/DOMWindowProperty.h"
@@ skipping 16 matching lines @@
 // Implements the main entry point of the Presentation API corresponding to the Presentation.idl
 // See https://w3c.github.io/presentation-api/#navigatorpresentation for details.
 class Presentation final
     : public RefCountedGarbageCollectedEventTargetWithInlineData<Presentation>
     , public DOMWindowProperty {
     REFCOUNTED_GARBAGE_COLLECTED_EVENT_TARGET(Presentation);
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(Presentation);
     DEFINE_WRAPPERTYPEINFO();
 public:
     static Presentation* create(LocalFrame*);
-    virtual ~Presentation();
+    ~Presentation() override;
 
     // EventTarget implementation.
-    virtual const AtomicString& interfaceName() const override;
-    virtual ExecutionContext* executionContext() const override;
+    const AtomicString& interfaceName() const override;
+    ExecutionContext* executionContext() const override;
 
     DECLARE_VIRTUAL_TRACE();
 
     PresentationSession* session() const;
 
     ScriptPromise startSession(ScriptState*, const String& presentationUrl);
     ScriptPromise joinSession(ScriptState*, const String& presentationUrl, const String& presentationId);
     ScriptPromise getAvailability(ScriptState*, const String& presentationUrl);
 
     DEFINE_ATTRIBUTE_EVENT_LISTENER(defaultsessionstart);
@@ skipping 20 matching lines @@
     // The session object provided to the presentation page. Not supported.
     Member<PresentationSession> m_session;
 
     // The sessions opened for this frame.
     HeapHashSet<Member<PresentationSession>> m_openSessions;
 };
 
 } // namespace blink
 
 #endif // Presentation_h