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

Source/modules/presentation/PresentationController.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 PresentationController_h
 #define PresentationController_h
 
 #include "core/frame/LocalFrameLifecycleObserver.h"
 #include "modules/ModulesExport.h"
 #include "modules/presentation/Presentation.h"
@@ skipping 12 matching lines @@
 // The coordinator between the various page exposed properties and the content
 // layer represented via |WebPresentationClient|.
 class MODULES_EXPORT PresentationController final
     : public NoBaseWillBeGarbageCollectedFinalized<PresentationController>
     , public WillBeHeapSupplement<LocalFrame>
     , public LocalFrameLifecycleObserver
     , public WebPresentationController {
     WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(PresentationController);
     WTF_MAKE_NONCOPYABLE(PresentationController);
 public:
-    virtual ~PresentationController();
+    ~PresentationController() override;
 
     static PassOwnPtrWillBeRawPtr<PresentationController> create(LocalFrame&, WebPresentationClient*);
 
     static const char* supplementName();
     static PresentationController* from(LocalFrame&);
 
     static void provideTo(LocalFrame&, WebPresentationClient*);
 
     WebPresentationClient* client();
 
     // Implementation of HeapSupplement.
     DECLARE_VIRTUAL_TRACE();
 
     // Implementation of WebPresentationController.
-    virtual void didStartDefaultSession(WebPresentationSessionClient*) override;
-    virtual void didChangeSessionState(WebPresentationSessionClient*, WebPresentationSessionState) override;
-    virtual void didReceiveSessionTextMessage(WebPresentationSessionClient*, const WebString&) override;
-    virtual void didReceiveSessionBinaryMessage(WebPresentationSessionClient*, const uint8_t* data, size_t length) override;
+    void didStartDefaultSession(WebPresentationSessionClient*) override;
+    void didChangeSessionState(WebPresentationSessionClient*, WebPresentationSessionState) override;
+    void didReceiveSessionTextMessage(WebPresentationSessionClient*, const WebString&) override;
+    void didReceiveSessionBinaryMessage(WebPresentationSessionClient*, const uint8_t* data, size_t length) override;
 
     // Connects the |Presentation| object with this controller.
     void setPresentation(Presentation*);
 
 private:
     PresentationController(LocalFrame&, WebPresentationClient*);
 
     // Implementation of LocalFrameLifecycleObserver.
-    virtual void willDetachFrameHost() override;
+    void willDetachFrameHost() override;
 
     WebPresentationClient* m_client;
     PersistentWillBeMember<Presentation> m_presentation;
 };
 
 } // namespace blink
 
 #endif // PresentationController_h