Make Frame subclasses final.

third_party/WebKit/Source/core/frame/LocalFrame.h

 /*
  * Copyright (C) 1998, 1999 Torben Weis <weis@kde.org>
  *                     1999-2001 Lars Knoll <knoll@kde.org>
  *                     1999-2001 Antti Koivisto <koivisto@kde.org>
  *                     2000-2001 Simon Hausmann <hausmann@kde.org>
  *                     2000-2001 Dirk Mueller <mueller@kde.org>
  *                     2000 Stefan Schimanski <1Stein@gmx.de>
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2008 Nokia Corporation and/or its subsidiary(-ies)
  * Copyright (C) 2008 Eric Seidel <eric@webkit.org>
@@ skipping 62 matching lines @@
 class PluginData;
 class Range;
 class ScriptController;
 class ServiceRegistry;
 class SpellChecker;
 class WebFrameHostScheduler;
 class WebFrameScheduler;
 
 extern template class CORE_EXTERN_TEMPLATE_EXPORT Supplement<LocalFrame>;
 
-class CORE_EXPORT LocalFrame : public Frame, public LocalFrameLifecycleNotifier, public Supplementable<LocalFrame> {
+class CORE_EXPORT LocalFrame final : public Frame, public LocalFrameLifecycleNotifier, public Supplementable<LocalFrame> {
     USING_GARBAGE_COLLECTED_MIXIN(LocalFrame);
 public:
     static LocalFrame* create(FrameLoaderClient*, FrameHost*, FrameOwner*, ServiceRegistry* = nullptr);
 
     void init();
     void setView(FrameView*);
     void createView(const IntSize&, const Color&, bool,
         ScrollbarMode = ScrollbarAuto, bool horizontalLock = false,
         ScrollbarMode = ScrollbarAuto, bool verticalLock = false);
 
@@ skipping 240 matching lines @@
     explicit ScopedFrameBlamer(LocalFrame*);
     ~ScopedFrameBlamer();
 
 private:
     Member<LocalFrame> m_frame;
 };
 
 } // namespace blink
 
 #endif // LocalFrame_h